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3. Rewrite each sentence beginning as shown. Do not change the meaning.
a) I’m sure that bag isn’t yours.
That can’t be your bag.
b) My advice is to talk to your teacher about it.
I think you………………………..
c) It’s not necessary for you to be here before 8.00.
You……………………………….
d) I’m sure that Sam knows the answer.
Sam……………………………….the answer.
e) I’m sorry I’m late. It was necessary for me to go to the doctor’s.
I’m sorry I’m late. I…………………………….
f) Perhaps Cathy is at the library.
Cathy ………………………………………….at the library.
g) What is your advice?
What do you think……………………..do?

b I think you should talk to your teacher about it.

c You needn't be here before 8.00.

d Sam should know the answer.

e I had to go to the doctor's

f Cathy must be at the library

g What do you think I should do?

b) I think you should talk to your teacher about it.

c) You don't need to be here before 8.00.

d) Sam should know the answer.

e) I had to go to the doctor's

f) Cathy must be at the library

g) What do you think I should do?