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(共20張PPT)
Grammar
Unit 4 Hands-on fun
Imperative sentence
祈使句
part 01
什么是祈使句？
表示請求、命令、勸說、警告等句子。主語往往被省略 ，句末通常是"."或"!"
Turn left.
No parking!
祈使句有什么類型？
以動詞原形開頭,表示命令
Sit down.
Be quiet.
Please open the door.
句尾或句末加上please，表示更加委婉或禮貌。
以 Let 開頭,表示請求或建議
Let me have a look.
Let's go home！
Let's go shopping！
以 Don't 開頭，祈使句的否定形式
Don't touch the wire.
Don't fly!
以 No 開頭,表示公告警示語，也是祈使句的否定形式
No photos !
No parking !
Look at the pictures and help Millie complete the sentences.
1. out pieces of card with a pair of scissors.
2. some words or a sentence on each card.
Cut
Write
3. a picture about the words or sentence on the other side of the card.
4. at the picture and to say what is on the other side.
Please (not) up. trying and you will find you can remember things better.
Draw
Look
try
don’t give
Keep
用括號內所給詞的正確形式填空。
1. (be) careful! The bus is coming.
2. It’s too cold in the room. (close) the door, please.
3. - Tom, it’s time for class.
-Ok, Let’s (go)
4. (not smoke) here, Tony. Smoking is not allowed in public places.
5. Don’t (be) afraid of making mistakes and just have a try.
Be
Close
go
Don’t smoke
be
should & had better
part 02
當我們給他人提建議時，可以用should和had better表示“應該”或“最好”做某事, had better的語氣比should強一些。
注意：should 和had better都是情態動詞，后接動詞原型，而且均沒有人稱和數的變化。
You should eat more vegetables. 健康建議
You had better leave now,or you will miss the bus! 隱含錯過結果
had better中的had 常縮略為‘d
should的否定形式為： should not/shouldn’t
had better的否分形式為：had better not
You should not keep a pet if you don’t have enough time.
She had better not forget the key.
should do sth.應該做某事
should not do sth.不應該做某事
had better do sth.最好做某事
had better not do sth.最好不要做某事
5 mins
Let’s check
You should/had better＋f
You should/had better＋b
You should not/had better not＋a
You should/had better＋d
You should/had better＋e
You should/had better＋c
You should not/had better not＋g
用括號內所給詞的正確形式填空。
1.You'd better____________(go) at once(立刻).
2.You had better_____________( not begin)your work without reading the instructions.
3.We should _____________ (not walk) on the grass.
4.We should___________ (offer )help to the people in need.
5. You’d better __________ (play)basketball in the park. It’s dangerous.
go
not begin
not walk
offer
not play
Homework
1. Review the Grammar and make some sentences with should (not) and had better (not).
2. Finish the Exercises in the workbook.
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