一、結構
（一）主語+be+……
1.陳述句肯定式（肯定句）：主語+be（am, is, are）+……，其中be（am, is, are）用法口訣如下：
I是am；
you是are；
is連著he, she, it；
單數用is, 復數全用are。
2.陳述句否定式（否定句）：主語+be（am, is, are）not+……，其中am not沒有縮寫形式；is not縮寫為isn't；are not縮寫為aren't。
3.一般疑問句：Be（am, is, are）+主語+……？其中I am……的一般疑問句常常變為Are you……? Yes，主語+be.（肯定回答） No,主語+be not.（否定回答）
主語+動詞（行為動詞，除了be）+…
主語（不是三單）+動詞（原形）+…
陳述句肯定式（肯定句）：主語（不是三單）+動詞（原形）+……
陳述句否定式（否定句）：主語（不是三單）+don't+動詞（原形）+……
一般疑問句：Do+主語（不是三單）+動詞（原形）+……？Yes，主語+do.（肯定回答）No，主語+don't.(否定回答）
主語（三單）+動詞（三單）+……
主語三單即主語的第三人稱單數形式；動詞三單即動詞的第三人稱單數形式。動詞三單的變化規則：
①一般情況下在動詞后加s。
②以s, x, sh, ch, o結尾的動詞在后面加es。
③以輔音字母+y結尾的動詞，把y變為i，再加es。
* 例外的需要特殊記憶：be–is；have–has
陳述句肯定式（肯定句）：主語（三單）+動詞（三單）+……
陳述句否定式（否定句）：主語（三單）+doesn't+動詞（原形）+……
一般疑問句：Does+主語+動詞（原形）+……？Yes，主語+does.（肯定回答）No,主語+doesn't.（否定回答）
二、用法
1.表示經常性的、習慣性的、反復發生的動作。常常和表示時間的頻率副詞often, always, usually, sometimes, never, every day等連用。如：I get up at six o'clock every day.
2.表示現在的狀態，也可以用一般現在時態。如：The library is on the right of the classroom building.
3.在由when, before, after，as soon as, until，if等引導的時間狀語從句或條件狀語從句中， 用一般現在時代替將來時。如：If it is cloudy tomorrow, we'll stay at home.
4.表示客觀事實或普遍真理，用一般現在時。如：The earth goes round the sun.
三、練習
（一）用括號中所給詞的適當形式填空。
1.Where_____(be)your sister?
2.Lucy and I_____(be not)at school today.
3.She_____(come)from Class 3.
4._____they_____(play)football every day？
5.When_____Tom_____(get)up every morning?
6._____(be)Daming in Grade 9? Yes.
7.What lesson_____we_____(have)on Mondays?
8.How_____we_____(do)our homework on the computer？
9.The earth_____(go)round the sun.
10.She_____(not do)her homework every weekend.
（二）根據要求句型轉換。
1.They are from Shanghai.（否定句）
2.She is in Class One.（劃線提問）
3.It's twelve o'clock now.（劃線提問）
4.My father often talks to his customers on the computer.（劃線提問）
5.We always have birthday parties at a hotel.（劃線提問）
6.She goes to the cinema every Friday.（一般疑問句）
7.Does Lucy do her homework every weekend?（陳述句）
8.He is an English teacher at a school.（否定句）
9.They don't listen to music on Thursday.（肯定句）
10.Maths is Tom's favourite subject.（劃線提問）
（三）句子翻譯。
1.他們來自哪里?
2.你喜歡地理嗎？
3.我們周五不打籃球。
4.他們從來不做蛋糕。
5.如果明天下雨，我們就不去吃野餐。
6.她有時候上學遲到。
7.你間隔多久看一次電影？
8.他喜歡歷史，因為它有趣。
9.這個女孩從來不玩電腦游戲。
10.他每天上網搜尋信息。
四、練習參考答案
（一）1.is 2.aren't 3.comes 4.Do play 5.does get 6.Is 7.do have 8.do do 9.goes 10.doesn't do
（二）1.They aren't from Shanghai.
2.What class is she in?
3.What time is it?/What's the time?
4.What does your father often do on the computer?
5.How long do you have birthday parties at a hotel?
6.Does she go to the cinema every Friday？
7.Lucy does her homework every weekend.
8.He isn't an English teacher at a school.
9.They listen to music on Thursday.
10.What is Tom's favourite subject?
（三）1.Where are they from?/Where do they come from?
2.Do you like geography?
3.We don't play basketball on Fridays.
4.They never make a cake.
5.If it rains tomorrow, we won't have a picnic.
6.She is sometimes late for school./She sometimes goes to school late./Sometimes she is late for school./Sometimes she goes to school late.
7.How long do you see a film/watch a movie?
8.He likes history because it's interesting.
9.The girl never plays computer games.
10.He searches for information on the Internet every day.
原創文章，作者：清風徐來，如若轉載，請注明出處：http://www.guwendong.com/18691.html
