1. It's cold. You should/shouldn't turn on the fan. 2. You ought not to/ought to do homework before you go out with your friends. 

3. You should/shouldn't eat plenty of fruit or vegetables every day in order to keep healthy. 4. You must/mustn't eat in the class. 5. You ought to/ought not to drink a lot of water every day. 6. I must/have to submit my homework before 12 o'clock because the deadline is 12 o'clock. 7. I must/have to stay at home to take care of my children. 8. My friend says: "You don't have to/mustn't drink champagne. You can have a coke or fruit juice instead. 

9. You don't have to/mustn't drink if you're going to drive afterwards.

 10. You don't have to/mustn't pick up Tom at the airport because Judy will 

Rewrite the sentences using should/ shouldn't

1. Don't touch this switch.

-> This switch.......................................

2. It isn't a good idea for you to put so much salt in the soup.

-> You shouldn't .............................................................

3. It isn't a good idea for you to drink so much alcohol

-> You shouldn't ...............................................................

4. Don't trip over the step into the kitchen

-> You shouldn't ...............................................................

5. You can't park here because it's a restricted area.

-> You shouldn't ...............................................................

6. Why didn't they tell me about these changes earlier?

-> I should have been ....................................................

7. Don't lean against the newly-painted wall.

-> You shouldn't ............................................................

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Rewrite the sentences using should/ shouldn't

1. Don't smoke too many cigarettes.

-> You shouldn't .................................................

2. Children are advised to go to bed early.

-> Children should ............................................

3. You had better not to stay up late.

-> You shouldn't ...................................................

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Exercise 7. Reorder the words to make sentences

4.too / her / Why / fast. / ride / bike / sister / shouldn't / your
=> … ……………………………………………………………………………
5. ride / shouldn / wear / you / motorbike. / your / helmet / You / when / a
=> ………………………………………………………………………………
6. drown. / lake / the / she / She / into / shouldn't / may / because / jump
=> ………………………………………………………………………………
7.  his / He / off / and / his / bike / broke / fall / leg.
=> ………………………………………………………………………………
8. to / his / driving / he / car / Is / cirty / the / centre?
=> ………………………………………………………………………………
9.the / pick / grapes. / to / to / climb / She / is / same / tree / going
=> ………………………………………………………………………………
10. for / river. / is / to / this / dangerous / in / It / very / you / swim

=> ………………………………………………………………………………

Sắp sếp 

4.too / her / Why / fast. / ride / bike / sister / shouldn't / your
=> … ……………………………………………………………………………
5. ride / shouldn / wear / you / motorbike. / your / helmet / You / when / a
=> ………………………………………………………………………………
6. drown. / lake / the / she / She / into / shouldn't / may / because / jump
=> ………………………………………………………………………………