内容正文:
3、 Grammar--现在进行时
一、现在进行时的定义:一般表示此刻正在进行的动作,也表示目前阶段一直进行的动作。
二、用法:
1.现在进行时一般表示此刻正在进行的动作,常和now,right now,at this moment等
时间状语连用,以及动词look,listen等。
如:Look!She is cleaning my room now。
2现在进行时表示目前阶段一直进行的动作,但是说话时不一定正在发生,
常和“these days,this week,at present”等连用。
如:Is Jame working hard this term?
注意:
1. 一些表示状态和意愿的动词,如be,like,want,think,have等,不能用于现在进行时态。
如:I want to go home now。
2.come,go,leave,stay,start,arrive等表示往返或位置转移的动词,可以用现在进行时表示将要发生的动作,这些动词可以与“tomorrow,next week”等表示将来的时间状语连用。
The train is coming.火车将要来了。
3.现在进行时与always,often等词连用,也可表示习惯的、经常重复的动作。意为总是,老是。此时常常有埋怨、赞赏、惊讶等感情色彩。
如:Mary is always talking about her son.玛丽总是谈论她的儿子。(不满)
He is always helping others.他总是乐于助人。(赞赏)
三、结构:
1. 肯定句:主语+be(am,is,are)+现在分词+其他
如:He is doing his homework .
2. 否定句:主语+be(am,is,are)+not+现在分词+其他
如:He isn’t doing his homework .
3. 一般疑问句:be(am,is,are)+主语+现在分词+其他?
如:Is he doing his homework .
Yes, he is.\No, he isn’t.
4. 特殊疑问句:疑问词+be(am,is,are)+主语+现在分词+其他?
-What is he doing? -He is doing his homework .
句型转换,每空一词。
1.Benny is playing football in the playground. (改为否定句)
Benny________ ________ ________ football in the playground.
2.My mother is cooking a meal now. (改为一般疑问句并作肯定回答)
________ your mother________a meal now?
Yes, ________ ________.
3.They are watching TV at home. (对划线部分进行提问)
________ ________ they________ at home?
4.They are not watering flowers in the garden. (改为肯定句)
They________ ________ flowers in the garden.
5.Is she doing housework alone? (作否定回答)
________, ________ ________ ________.
四、现在分词的构成:
(1)一般情况下,直接加ing,如:cook-cooking
(2)以不发音的e结尾,去e加ing,如:make-making, taste-tasting
(3)以重读闭音节结尾,双写末尾的辅音字母,再加ing,
如:run-running, stop-stopping sit-sitting
get-getting run-running forget-forgetting begin-beginning
(4)以ie结尾的动词,改ie为y加ing ,die--dying lie--lying
写出下列动词的现在分词。
1.play ________ 2. dance ________ 3.go ________ 4. ski________
5. write ________ 6. put ________ 7. get ________ 8. begin ________
9. shop ________ 10. see _______