小学六年级英语四种时态总结
北京科技大学研究生分数线-观后感500字
 
小学六年级英语四种时态总结 
 
 
一、一般现在时 
 
标志词:always(总是) usually(通常)
often(经常) sometimes(有时) never(从不) every(每一)
行为动词词型变化形式  
一般现在时动词只有第三人称有词形变化,
其他人称(第一人称:I, we;第二人称:you;第三人称复数:they、my
friends)动词均用原
形
当主语是第三人称单数时,一般动词在一般现在时句子中的变化规律:
1、多数在动词后加s  play—plays like—likes ,
2、以s,x,sh,ch,o结尾的动词加es  wash–washes
catch–catches  do–does  
3、以辅音字母加y结尾,把y改i再加es
fly—flies study—studies  
4、以元音字母加y结尾,直接加s
buy – buys  
5、不规则变化  have—has  
一般现在时基本用法  
功能  
1.表示事物或人物的特征、状态。
如:The sky is blue.天空是蓝色的。  
2.表示经常性或习惯性的动作。
如:I get up at six every day.我每天六点起床。
3.表示客观现实。      如:The earth goes around the
sun.地球绕着太阳转。  
                          The
earth is round.  
构成  
1.
be动词:主语+be(am,is,are)+其它。   如:I am a boy.我是一个男孩。
2.行为动词:主语+行为动词(+其它)。    如:We study
English.我们学习英语。  
句型  
肯定句:动词:主语+ be + 其它成分
He is a worker.    
B.行为动词:主语+动词(注意人称变化) +其它成分
We like the little cat.  
否定句:动词:主语+ be + not
+其它成分    They are not students.
B.行为动词:主语+助动词(dodoes) + not +动词原形+其它成分  
We
don't like the little cat.  
一般疑问句:动词: Am  Is
Are +主语 + 其它成分  
Are you a teacher? Yes, I am.
No, I am not.    
Are they students of your
they are  No they aren,t.
B.行为动词:助动词(DoDoes)+主语+动词原形 + 其它成分  
Do you
like it? Yes, I do.  No. I don't .    
Does
he(she) like it? Yes, he( she )does.  No, he ( she
)doesn't.  
特殊疑问句:疑问词+ 一般疑问句  
动词: How many
students are there in your school?
B.行为动词:What do you usually do on Sunday?
  
一般现在时动词be和 have的变化形式  
。are,其它人称用is,第三人称单数用am用法:第一人称单数用, 叫连系动词Be 动词1.
:  
。如has以外,其它人称一律用have2.动词have的用法:第三人称单数用
,特别在疑问句和
否定句中。代替have  1.在英国,人们常用have got注意事项do,
does 时,构成疑问或否定
句时,就借助于助动词有”2.当have如果不表示“)
表示有否:I have not a new pen. (      如:I have a
new pen .      
)  
表示吃'clock. (否:I don't
have lunch at 12 o     I have lunch at 12 o'clock.
 
  
 
 
 二.现在进行时:
.
时间It's+标志词:now, look, listen,  表示正在进行的、发生的动作:
现在进行时 基本结构:
am  
be         is     + 动词 ing
are  
肯定句:主语 + be动词(am, are, is)+
现在分词(ing)+ 其他      I am watching TV.  
否定句:主语 +
be动词+ not + 现在分词(ing)+ 其他    I am not watching TV.
一般疑问句:Be动词(Am, Are, Is) + 主语 + 现在分词(ing)+ 其他
Are you watching TV?   Yes, I am.  No, I am
not.  
特殊疑问句:疑问词+ 一般疑问句  
            What
are you doing?  
  
动词的-ing形式的变化规律:  
1.
直接加-ing            watch—watching
clean—cleaning  
2. 以-y结尾的动词,直接加-ing
study—studying      play—playing  
3. 以不发音的-
e结尾的动词,先去-e再加-ing       make—making
come—coming  
4. 末尾只有一个元音字母和一个辅音字母的重读闭音节动词,
双写末尾字母,再加-ing     cut—cutting       
  
 
  
三、一般将来时的用法: 
表示将来某一时刻的动作或状态,或将来某一段时间内经常的动作或状态。
标志词:tomorrow(明天),the day after
tomorrow(后天),next (下一个),  
from now
on(从现在开始),in the future(将来),soon(不久)等   
结构:( 1 ) be(am,is ,are) +going to+动词原形
( 2 ) will+动词原形  
  
“be going
to+动词原形(打算…)”= ” will+动词原形(将,会…)”   
I will
study tomorrow.  
  I'm going to study
tomorrow.  
(be going to着重于事先考虑好    will
未事先考虑好)----一般不用考虑  
肯定句:主语 + be (am, are, is)
going to + 动词原形.       
主语 + will + 动词原形
否定句:主语 + be (am, are, is) not going to + 动词原形.
主语 + won't + 动词原形.  
一般疑问句:Be (Am, Are, Is)
+ 主语 + going to + 动词原形?     
Will + 主语 + 动词原形?
特殊疑问句:疑问词+ 一般疑问句?  
  
注意:will 常简略为 'll,
并与主语连写在一起,如:I'll,he'll,it'll,we'll,you'll,they'll。
 
 
  
  
四、一般过去时
标志词:yesterday(昨天), last (上一个), this
morning(今天早上),ago(以前),   
before (在…之前), in
2002(在2002年) 等
用法:表示过去某个时间发生的动作或存在的状态,常和表示过去的时间状语连用。
也表示过去经常或反复发生的动作  
  
动词过去式变化规则:
1.一般在动词末尾加-ed       如:watch-watched, cook-
cooked  
2.结尾是e加d         如:taste-tasted
3.末尾只有一个元音字母和一个辅音字母的重读闭音节,应双写末尾的辅音字母,再加-
ed,
如:stop-stopped  
4.以“辅音字母+y”结尾的,变y为i,
再加-ed,如:study-studied  
5.不规则动词过去式:am,is-was,
are-were, do-did, see-saw, say-said, give-gave…
  
句型:  
1、Be动词在一般过去时中的变化:  
⑴am 和is
变为was。  否定(was not=wasn't)  
⑵are 变为were。
否定(were not=weren't)  
否定句:在 was或were后加not
一般疑问句:把was或were调到句首。  
2、行为动词在一般过去时中的变化  
否定句:didn't + 动词原形
如:Jim didn't go home yesterday.
一般疑问句:在句首加Did,句子中的动词过去式变回原形    如:Did Jim go
home yesterday?  
特殊疑问句:(1)疑问词+did+主语+动词原形?
如: What did Jim do yesterday?
(2)疑问词当主语时:疑问词+动词过去式? 如:Who went to home
yesterday? 
 
  
附录:小学常用不规则动词过去式 
  
一、不规则动词的过去式的构成
1.把动词原形中的i改为a,变成过去式。如:   
begin—began,drink
—drank,give—gave,ring—rang,sing—sang,sit—
sat,s
wim—swam   
2.把重读开音节中的i改为o,变成过去式。如:
drive—drove,ride—rode,write—wrote
3.改动词原形中的aw /ow为ew,变成过去式。如:   
draw—drew,gr
ow—grew,know—knew,throw—threw(动词show除外,show
—sh
owed)   
4.动词原形中的e改为o,变成过去式。如:
get—got,forget—forgot
5.动词原形中的ee改为e,变成过去式。如:   
feed—fed,meet—met
6.动词原形中的eep改为ept,变成过去式。如:
keep—kept,sleep—slept,sweep—swept
7.动词原形中的eak改为oke,变成过去式。如:
break—broke,speak—spoke
8.动词原形中的ell改为old,变成过去式。如:
sell—sold,tell—told
9.动词原形中的an改为oo,变成过去式。如:
stand—stood,understand—understood
10.以ought和aught结尾,且读音是〔 :t〕的过去式。如:
bring—brought,buy—
bought,think—thought,catch—caught,teach—
taught
11.以ould结尾且读音为〔ud〕的情态动词过去式。如:
can—could,shall—should,will—would
12.把动词原形中的o改为a,变成过去式。如:
come—came,become—became
13.在动词原形后加d或t变成过去式,并且发生音变。如:   
hear〔hi
〕—heard〔h :d〕,
say〔sei〕—said〔sed〕,mean〔mi:n〕—meant
〔ment〕
14.动词的过去式与动词原形一样。如:
let—let,must—must,put—put,read—read〔red〕
  
  
  
二.不规则动词表  
原形        过去式                 中文释义  
am
was              是(表示存在、状态等)  
 是(表示存在、状态等)are
were              
become      became
成为;变成  
begin       began            开始
break       broke            打破  
bring
brought          拿来;取来;带来  
build       built
构筑;建造;建筑  
buy         bought           购买;买
can         could            可以;能;可能;会
catch       caught           赶上(车船等);捕获
come        came             来;来到  
cut
cut              切;割;削;剪  
做;干;行动 dodoes
did               
画draw        drew
喝;饮drink       drank              
开车;驾驶
drive       drove             
吃eat         ate
感到;觉得feel        felt               
寻找;查找
find        found             
飞行 fly
flew              
忘记;忘却forget      forgot
变得get         got                
给;授予 give
gave              
去go          went
得(病);患(病);有;吃;饮 havehas    had
 hear        heard            听见;听说 hide
hid              
隐藏 is          was
是(表示存在、状态等) keep        
kept
保持;使保持某种状态 know        knew             
道;了解
离去;出发leave       left              
 允许;让let
let               
 失去;丧失lose        lost
 使;促使;迫使;做;制作make        made
 可能;可以may         might             
表示……的意思;作……的解释mean        meant             
meet        met              遇见;相逢 put         put
放;摆;装 read        read e         读;阅读 ride
rode             
骑(铃)响 ring        rang
 rise        rose             上升 跑;奔跑run
ran               
 say         said
说;讲 看见see         saw               
发送;寄;派;遣send        sent
知
set         set              放, 置
show        showed           出示;给……看  
shut
shut             关上(门、盖、窗户等)  
sing        sang
唱;唱歌  
sit         sat              坐
sleep       slept            睡;睡觉  
speak
spoke            说;说话  
swim        swam
游泳  
take        took
搭乘;花费(时间);拿走;带到  
teach       taught
教;讲授  
tell        told             告诉;讲述
think       thought          想;思考  
will
would            将要  
win         won
赢;获胜  
write       wrote            书写 
  
  
  
  
  
  
  
小学英语语法(词性)总结 
 
以上时,用形容词或副词的最高级。  
比较级     
二者比较,标志词:than  
最高级
三者以上比较,标志词:the     
形容词、副词的比较级和最高级的变化规律:  
一、形容词、副词的比较级和最高级的用法:
 
当两种物体之间相互比较时,我们要用形容词或副词的比较级;当相互比较的物体是三个或三
个
fastest  
—faster—fast    tallest
—taller—tall   -est 或-er单音节形容词或副词后面直接加1.
nicest ——nicerlarger—largest  nice2.
以-e结尾的单音节形容词或副词直接加-r或-st  
large— -est
-er或结尾的形容词或副词,改-y为-i再加3. 以-yearliest
——earlier—busiest  earlybusy—busierhottest
——hotter   hot4. 形容词或副词是重读闭
音节时,双写最后的辅音字母,再加-
er或-est  
most beautiful more beautiful—
beautiful—多音节形容词或副词前面直接加5. more或
most  
most
slowly  
more slowly—  slowly—6.
以ly结尾的副词一般加more或most  
little-less-least    bad
(badly)-worse-worst   7. 不规则变化    good (well)-
better-best  
 most - more –(much)far-
farther-further   many  
 形容词、副词的比较级和最高级用法:
比较级:
 物体B形容词比较级 + than + 1、形容词:
物体A + am
are  is +  
This picture is more beautiful than
that one.  
 I am taller than you.   
 B. +
than + 物体物体A + 行为动词 + 副词比较级2、副词:He studies better
than me. 
 
  最高级:
. 地方)物,in +  + 比较范围(of
+ 人1、形容词:物体A + am  are  is + the 
+
形容词最高级Shanghai is one of the biggest cities in
China.    I am the tallest in the 
class.
. 地方)物,in + 比较范围(of + 人+ 2、副词:物体A + 行为动词 +
副词最高级  
He studies best of us.    Cheetahs run
fastest in the world.  
 
表示两者对比相同:
主语+谓语+as+形容词副词原形+as+从句  
This
box is as big as mine.   This coat is not soas
cheap as that one.    
I study English as hard
as my brother. 
 
  
  
 
英语比较级和最高级 练习  
(一)1.A pig is __ than a dog.
A. much heavy    B. more heavier  
C much
heavier    D. more heavy    
2.--Which is __
season in Beijing?    
 --I think it's spring.
A. good  B. well  C. best  D. the best
3. The city is becoming ______.    
A. more
beautiful and more   
B. more beautiful and
beautiful    
C. more and more beautiful
D. more beautiful and beautifuler
 does Alice like _____ , Chinese or
Art?       
  much D. better C. best B. well
A.  
  world. ____ in the  Changjiang River is
one of  
  rivers   B. longest A. the longest
river     
  rivers   D. longer C. the longest
rivers   
  me.  better than Chinese   speaks
_____   
  much of D. B. more  C. a lot A. very
  Four.  in Class  Two than  are ____ boys in
Class  D. best B. many C. 
most A. more  
or Lucy? oranges now, Jim, Lily  has _____  
the most C. better D. A. much B. biggest  
family. _____ is in my   
  more the busiest D.
A. busy B. busier C.  
  class. in the one  is
_____ Lucy  
 as as taller tallest as  B. A. so
C. so high as   D. as tall as    
(二)
写出下列形容词与副词的比较级与最高级形式:   
long_____ ______ wide
______ _______ fat ____ _____   
heavy____
______ slow ______ _______ few____ _____
brightly______ -_____ bably _____ _______
far____ _____   
quickly _____ ______
happy_____ -______ unhappy________
(三)用所给词的正确形式填空:   
1. Of the two girls, I
find Lucy the _______ (clever).   
2. Gold(黄金)
is ______ (little) useful than iron(铁).   
3.
My sister is two years _______ (old ) than I.
4. John's parents have four daughters, and she
is the _____ (young) child.   
5. The _____
(cheap) bags are the not usually the best ones.
6. The short one is by far _______ expensive
of the five.   
7. The boy is not so ______
(interesting) as his brother.   
8. Dick sings
_____ (well), she sings ______(well) than John,
but Mary  
sings______(well) in her class.
9. She will be much ______ (happy) in her mew
house.   
10. This dress is ______ that.(twice,
as…as…, expensive)   
  
  
  
  
  
 参考答案:(一)C D C C C D A D C D
(二)longer longest    wider widest  
fatter
fattest     heavier heaviest  
slower slowest
fewer fewest  
more brightly, most brightly
worse, worst  
further,furthest
more quickly, most quickly  
happier happiest
unhappier unhappiest  
(三)clever       less
Older        youngest  
Cheapest       the
most  
Interesting       well, better, the best
Happier         twice as expensive as 
  
 
 
  
  
  
  
二、情态动词
 
情态动词的定义:情态动词有词义,但它不能单独作谓语,它必须和其他动词一起构成谓语。
情态动词没有人称和数的变化,后加动词原形。  
  
can 能够,会
may 可以      shall 将,要      should 应该     must  必须
have(has)to 不得不     had better  最好
情态动词的用法:  
情态动词 肯定句 否定句  
can 主语 + can +
动词原形 主语 + can + not + 动词原形  
may 主语 + may +
动词原形 主语 + may + not + 动词原形  
shall 主语 + shall +
动词原形 主语 + shall + not + 动词原形  
should 主语 +
should + 动词原形 主语 + should + not + 动词原形  
must
主语 + must + 动词原形 主语 + must + not + 动词原形
have(has)to 主语 + have(has)to + 动词原形 主语 +
don't(doesn't)+  
 have(has)to + 动词原形  
动词原形+ had better + not +  主语 动词原形+ had better +
主语had better  
  
情态动词 疑问句 肯定回答 否定回答
Can + 主语+动词原形? Yes, ~can  can. No, ~ can't.
May + 主语+动词原形? may Yes, ~ may.  Sure. No, ~
may not.  
Shall + 主语+动词原形shall ? Yes, please.
All right. No, let's not.  
Should +主语+动词原形?
Yes, ~ should should. No, ~ shouldn't.  
Must +
主语+动词原形? Yes, must  
~ must. No, ~ needn't.
Do (does)+主语 hashave()to +  Yes, ~ do (does).
No, ~don't (doesn't).  
have to +动词原形?
/ / /had better  
 
 
三、名词复数规则 
1.一般情况下,直接加-s,如:book-books, bag-bags, cat-
cats, bed-beds  
2.以s. x. sh. ch结尾,加-es,如:bus-
buses, box-boxes, brush-brushes, watch-watches
3.以“辅音字母+y”结尾,变y为i, 再加-es,如:family-families,
strawberry-strawberries  
4.以“f或fe”结尾,变f或fe为v,
再加-es,如:knife-knives  
5.不规则名词复数:man-men,
woman-women, policeman-policemen,
policewoman-policewomen, mouse-mice, child-
children,foot-feet,  
tooth-teeth,fish-fish,
people-people, Chinese-Chinese, Japanese-Japanese
  
可数名词变为复数形式有如下变化,如下表: 
 
 
情况 构成方法 例词  
desk-desks, apple-apples +s
在词尾一般情况class-classes, box-boxes 以-
结尾的词 在词尾+es
peach-peaches, dish-dishes  
factory-
factories, family-families 以辅音字母加y结尾的词 变y为i再+es
在词尾以元音字母加y结尾的词day-days, boy-boys, key-key  +s
变f或fe为以f或fe结尾的词 vknife-knives, wife-wives 再+es
leaf-leaves, life-lives  
有生命的 +es
以辅音字母o结尾的词potato-potatoes, hero-heroes  
无生命的+s
photo-photos  
以oo结尾的+s  
技巧归纳
改f(e)为ve加s口诀  
(1)树叶半数自己黄   妻子拿刀去割粮
架后窜出一只狼   就像小偷逃命忙  
(2)常用不规则名词复数形式   foot-feet
脚    man-men   男人     woman-women   
女人
tooth-teeth   牙    mouse-mice   老鼠     goose-geese
鹅     
child-children    
小孩  
(3)单复数同形
fish 鱼     li 里     jin 斤      yuan  元     mu   亩
sheep 羊    
deer 小鹿     Chinese  中国人
Japanese  日本人    means 手段  
单复名词同形:中国人日本人都爱绵羊
鹿和鱼.  
 作定词修饰复数时需变为复数形式man woman    高频考点. 
many women leaders 很多女领导   two men doctors  两位男医生
 (4)只有复数形式,没有单数形式  鞋  shoes 商品  glasses  眼镜
clothes  衣服  shorts  
短裤  goods trousers  裤子
 )常用不可数名词(5        gold 金steel  rain  雨     钢
bread advice  建议  
baggage  行李    面包     
butter 黄油    paper 纸      草       glass 玻璃     oil
油   sand  沙    
grass  
     水
smoke    water   salt 盐    beauty 漂亮   change  零钱
information 
信息   snow  雪 tea  茶      food 食品
money  钱     cloth homework  作业  布    
 牛奶
milk     fruit 水果大米 家具   cotton  棉花    rice
wealth  财富   furniture 
 
四、介词口诀: 
介词的用法  
早、午、晚要用in,at黎明、午夜、点与分。
年、月、年月、季节、周,阳光、灯、影、衣、冒in。
将来时态in...以后,小处at大处in。
有形with无形by,语言、单位、材料in。  
特征、方面与方式,心情成语惯用in。
介词at和to表方向,攻击、位置、恶、善分。  
日子、日期、年月日,星期加上早、午、晚,
收音、农场、值日on,关于、基础、靠、著论。
着、罢、出售、偷、公、假,故意、支付、相反,准。
特定时日和“一……就”,on后常接动名词。
年、月、日加早、午、晚,of之前on代in。
步行、驴、马、玩笑on,cab,carriage则用in。  
at山脚、门口、在当前,速、温、日落、价、核心。
工具、和、同随with,具有、独立、就、原因。
就……来说宾译主,对、有、方状、表细分。
海、陆、空、车、偶、被by,单数、人类know to man。  
this、that、tomorrow,yesterday,next、last、one。
接年、月、季、星期、周,介词省略已习惯。
over、under正上下,above、below则不然,
若与数量词连用,混合使用亦无关。‘
beyond超出、无、不能,against靠着,对与反。
besides,except分内外,among之内along沿。
同类比较except,加for异类记心间。  
  
原状because
of,、 owing to、 due to表语形容词
under后接修、建中,of、from物、化分。  
before、after表一点, ago、later表一段。  
过去极有限。ago能接完成时,before
since以来during间,since时态多变换。
与之相比beside,除了last but one。
复不定for、找、价、原,对、给、段、去、为、作、赞。
快到、对、向towards,工、学、军、城、北、上、南。  
but
for否定用虚拟,复合介词待后言。  
ing型由于鉴,除了除外与包合。
之后、关于、在......方面,有关介词须记全。
in内to外表位置,山、水、国界to在前。 
 
  
五、代词的用法.
 
 
主格 I you he she it we they  
them
him it her 宾格 me us you  
their his its my our
your  形容词性物主代词her  
theirs  
mine his
its  
名词性物主代词 hers  
yours  
ours
yourself  
myself  
反身代词 himself herself
itself ourselves themselves  
yourselves 
 
主格:一般放在句子前,做主语.
宾格:一般放在动词,介词(for、to、of…)后. 
 
形容词性物主代词:修饰名词,放在名词前.  
名词性物主代词:代表名词,后不跟名词.
  
反身代词及其一般用法  
反身代词表示动作回到其执行者本身用以加强语气。
反身代词的分类  
1.第一人称    单数:myself 我自己
复数:ourselves 我们自己  
2.第二人称    单数:yourself 你自己
复数:yourselves 你们自己  
3.第三人称    单数:himself 他自己
herself 她自己  itself  它自己  
复数:themselves 他们自己、她们自己、它们自己  
  
反身代词在句子中的用法. 
1.作表语         She's not herself
today. 她今天跟平常真是判若两人。  
2.作宾语         Please
help yourself to some fish.  请随便吃点鱼。  
3.作介宾
I learned English by myself.   我自学英语。  
4.作同位语
He can do that himself.  他自己能做那件事。 
 
There
be 
 有,表示存在。  
There is+单数、不可数名词       There
are+复数  
“There be” 句型结构:  
肯定句: “ There be+
主语(某人  某物)+ 某地     There isa boy in the room.
否定句:  “There be + not (any)+ 主语 + 某地
There aren't any books on the desk.
一般疑问句:“Be(is、are) there +(any)+ 主语 + 某地
“Yes , there is  are.”       “No, there isn't
aren't. ”  
 
 
It +be 
  
谈论天气   “
It's going to rain.”    说到时间   “It's time to go to
school.”  
距离远近   “It's far to get there.”
情况程度   “It's hard to learn.” 
 
六、连词的用法
  
一、并列连词:             
1. and    连接单词
My brother and I study in the same school.
          连接短语    Our knowledge may come from
the books and from practice.    
          连接句子
We are singing and they are dancing.
2. but  但是而是      I have a pen but no pencil.
   or   或者          Will you go there by bus
or on foot?                           
g but
除了,只有    I did nothing but watch it.
表示否则         Hurry up or you will be late.
 表示因为        He is good at math for he studies
harder than others.              
表示后句概念由前句转折而来  
The weather is very cold, still
we needn't wear more clothes.              
only…but also  不仅…而且    可并列主、谓、宾、表及句子
主语并列时,谓语要就近一致  Not only he but also I am a
teacher.   
 well as 以及,同样    并列单词、短语、句子。
并列主语时,动词要随前面的主语变化  He works as well as he can
…or  既…又…,或…或…  并列主、谓、宾、表及状语   Either come in
or go out.   
r…nor 既不…也不     并列主、谓、宾、表、状语,
并列主语时,谓语就近一致   Neither you nor he speaks
French.     
…and  和,既…也   并列主、谓、宾及表语    I can
play both football and 
basketball.  
也不,引导句子要倒装      He can not speak English, nor can
I.           
You like apples, so do I.  
二、从属连词:   
1.
after    表示“时间”,在…之后     
After I finished the
school, I became a worker in the factory.   
lot. a knows she young, is she Although     “尽管”
表示让步, ghthough  
表示时间,“当…时”,方式“象…”,原因,“由于、因为”让步,“尽管、虽然”
As it was late, we must go now.
 ifas though  表方式,“似乎、好像”      
He told is
such a story as though he had been there before.
 long asso long as  表条件,“只要”  As long as I am
free, I'll go to help you.   
 soon as
表时间,“一…就…”         I will phone you as soon as I
come back.  
e  表原因,“因为”          I have to
stay in bed because I am ill.         
表时间,“在…之前“       You should think more before you
do it.              
 if even though 表让步,“即使”
You should try again even if you failed.
…when 表时间,“(刚)一…就”  Hardly I entered the gate
when the bell rang.   
  “假如”,引导条件状语从句
What should I do net if the rain doesn't stop?
 “是否”,引导宾语从句    I don't know if he comes back
or not.              
 case  表目的,“以防,以免”  You
should be more careful in case there is a fire.
 order that  表目的,“为了,以便”   
We study hard
in order that we can pass the exam.   
 matter
+疑问词  表让步,“无论,不管”   
No matter what you do, you
should try your best.    
  
 sooner…than
表时间,“刚一…就…”     
 No sooner had I come home
than it began to rain.     
 that
表原因,“既然,因为,由于”      
Now that you are on
duty,you should clean the classroom.   
表时间,“一旦…”     Once you promise , you should do it.
  
三、其他     
  表时间,“自从…以来”    He has
been in this company since he left school.
         表原因,“既然,由于”  Since the job is
dangerous, let's do it more carefully.   
 far
asas far as 表条件,“就…而言,就…而论”      
As far as I know, it is easy for you to speak in
English.    
 that   表目的“以便”     Speak loud so
that everybody can hear clearly.              
表结果“如此,以致”    He got up so late that he missed the
bus.        
   表示比较,“比”          Things were
worse than we thought.              
无词义,引导名词性从句   It is dangerous that we walk on the
thin ice.     
引导定语从句和状语从句       She hurried
that she might not be late for work.     
表条件,“除非,如果不”    I will go to the zoo unless it
rains.              
ill  表时间,“直到…为止”     I'll
wait till he comes back.              
表时间,“当…时“        When they got there, the train
has left.              
r  “是否”引导名词性从句
Whether he can some to see us is unknown.
表让步,“不管无论、是否”   Whether she is ill or well,
she is always happy.  
   表时间,“当…时”       While
he was in Beijing, he visited the Great Wall.
表让步,“尽管,既然” While I find the problems very
difficult, I don't think them insoluble.  
er
表时间,“无论什么时候” Whenever you meet any trouble, tell
me at once.