外研版八年级英语上册课件 Module 12 Help Unit 3 (共13张PPT)

(共13张PPT)
What shall we do or not do if an earthquake happens
祈使句用来表达叮嘱、劝告、希望、禁止、警告、请求或命令等。祈使句最常用来表达命令。
Go and wash your hands.
快去洗手。 （命令）
Be quiet, please.
请安静。 （请求）
Be kind to our sister.
要对我们的妹妹友善。 （劝告）
Watch your steps.
走路小心。 （警告）
No littering.
不要乱扔垃圾。 （禁止）
Don’t forget to take an umbrella.
不要忘了带雨伞。 （叮嘱）
(5) Let 构成的祈使句往往用于提出建议。
Let’s go to school together.
咱们一起上学去吧。
let型祈使句有两种否定形式： 1) Let＋宾语＋not＋动词原形＋其它
Let him not go.
别让他走。
Let’s not waste time.
咱们不要浪费时间了。
2) Don’t＋let＋宾语＋动词原形＋其它
Don’t let her go there. 别让她去那儿。
口 诀
下面的口诀总结了祈使句的一般规律。一起来看看吧!
祈使句，有特点，
动词原形摆在前，
否定句式也不难，
Don’t 放在最前面，
其它一律都不变。
It’s an important meeting. _________ (not, be) late.
___________ (not, make) any noise! Your mother is sleeping.
__________ (not, speak) with your mouth full of food.
_________ (not, talk) and _______ (read) aloud.
Don’t be
Don’t make
Don’t speak
Don’t talk
read
Fill in the blanks.
5. ___________ (not, leave) your homework
for tomorrow, Larry.
6. _______ (look) out! A car is coming.
7. _______ (give) us ten years and just see
what our country will be like.
8. _________ (not, let) the baby cry.
Don’t leave
Look
Give
Don’t let
1. 咱们一起玩吧！
2. 请不要迟到。
3. 回答这个问题。
4. 不要这么吵闹。
Let’s play together.
Don’t be late, please.
Answer the question.
Don’t make so much noise.
Translate these sentences.
5. 上课安静。
6. 不要随处乱扔垃圾。
7. 不打架不骂人。
8. 让我看一看吧。
9. 对同学友好。
Be quiet in class.
Don’t throw rubbish everywhere.
Don’t fight or say rude words.
Let me have a look.
Be friendly to classmates.
Underline the correct words to complete the first aid instructions.
Get / Do not get medical help immediately.
Ask / Do not ask them where the pain is.
Lift / Do not lift them because you may drop them.
Keep / Do not move them to a more complete place.
Complete the news report with the correct form of the words in the box.
clear inside power rock trouble warn
Information is coming in that there could be _______ because of heavy rain in the north. The government is ________ people about __________ falling on mountain roads. Some roads have a lot of rocks on them, but people are trying to _______ them quickly. In some places there is no ________. And people must stay ________ to keep away from falling rocks.
trouble
warning
rocks
clear
power
inside
There are problems everywhere because of rain.
The government is warning people about an earthquake.
Some roads in the mountains have a lot of rocks on them.
People are trying to clear the rocks off the roads.
There is no problem with power.
T
T
F
F
F