Module 12 Help Unit 3 Language in use .课件(共22张PPT)

(共22张PPT)
Module 12
Unit3 Language in use
Learning objectives
1. To learn the grammar - imperative sentence.
2. To learn the grammar - imperative for suggestions and instructions:
must/can/could (for prediction)
That could be harmful!
Language practice
Betty, you must know!
Language practice
Stay away from windows and heavy furniture.
Language practice
Do not stand near street lights or under power lines.
Language practice
Presentation
一、祈使句
祈使句常见句型如下：1．动词原形构成的祈使句
此类祈使句暗含的主语是you，但通常省略，谓语动词用原形。否定句以don't或never开头。祈使句的句首或句末有时加please，还可以加上称呼语，并用逗号与句子主体隔开。
Have a nice day! 祝你度过美好的一天！
Don't waste your time! 别浪费你的时间了！
Presentation
2. let构成的祈使句
该类型的祈使句由“Let＋me/us/him/…＋动词原形”构成，往往用于请求允许(let us)或提出建议(let's)。
Let us have a try if you don't want to. 如果你(们)不想(试)，就让我们试试吧。(表示请求允许)
Let's spend this weekend in the countryside.
咱们这周到乡下过周末吧。(表示提出建议)
Presentation
3．无动词的祈使句
在请求、命令和口令中，常用无动词祈使句，它实际上是省略了动词，从而使语句更简洁有力。
Just a minute, please! 请稍等！
No smoking! 禁止吸烟！
Presentation
二、情态动词must, can, could 表示推测
1．情态动词must表示推测
情态动词must表示有把握的推测时，意为“一定，准是”，通常只用于肯定句。
The book must be Tom's.
这本书一定是汤姆的。
Presentation
2．情态动词can, could表示推测
can表示推测时，常用于否定句和疑问句。用于疑问句时，can比could表示的可能性要大；用于否定句时，can't意为“不可能”，表示否定的推测。
could则可用于肯定句、否定句和疑问句，表示某事有可能发生或可能是事实。在下面的例句中，can和could均表示“可能”。
Can/Could this be true 这有可能是真的吗？
Complete the sentences with could, must or mustn't.
1
1 It is dangerous. You　　　　keep out!
2 These stairs are not safe. You　　　　use them.
3 The rocks are falling down. You　　　　get hit.
4 The river is too deep. You　　　　swim in it.
5 Betty　　　　know what to do because she did some basic medical training.
must
mustn't
could
mustn't
must
Underline the correct words to complete the first aid instructions.
2
1 Get/Do not get medical help immediately.
2 Ask/Do not ask them where the pain is.
3 Lift/Do not lift them because you may drop them.
4 Keep/Do not keep them warm.
___
___
________
____
Complete the poster about earthquakes with the correct form of the words and expressions in the box.
3
When there is an earthquake...
1　　 　　　from the windows.
2　　　 　a table.
3　　 　　the lift.
4 the building quickly when the ground stops shaking.
5　 　calm.
Stay away
Hide under
Don't use
Leave
Keep
do not use　
hide under　
keep　
leave
stay away
Exercise
Ⅰ. 单项填空
(　　)1.[2019·天水]—Listen! Is that Linda playing the piano in the room
—No. It ________ be Linda. She has gone to London.
A．may not B．needn't
C．can't D．mustn't
C
(　　)2.[2019·日照]You ________ be very tired with the long drive. Let's stop to have a rest.
A．must B．can
C．shall D．need
A
(　　)3.[2019·铁岭]The dictionary ________ belong to Sam. You can see his name on it.
A．can B．must
C．need D．would
B
(　　)4.[2019·眉山]________ noise pollution, and we can live in a quiet environment.
A．Prevent
B．Preventing
C．Prevented
D．To prevent
A
(　　)5.[2019·葫芦岛]—My parents will take me to Shanghai Disneyland this summer holiday.
—________．
A．Good luck to you
B．It's a good idea
C．Best wishes to you
D．Have a good time
D
Ⅱ. 根据汉语意思完成句子
6．不要在这里拍照。
________ ________ _______________ here.
7．你犯了如此多的错误，你一定很粗心。
You made so many mistakes. You________ ________ very careless.
Don't take photos/pictures
must be
8．那个高个子男孩不可能是汤姆。汤姆个子矮。
That tall boy________ ________ Tom. Tom is short.
9．禁止停车！ ________ ________!
can't be
No parking
GOOD JOB