in

on

for

up

When she telephoned, we were having supper.

 When she telephoned, we had had supper.

When she telephoned, we had supper.

When she telephoned, we were had to have supper.

He says he enjoyed playing the guitar.

He said he would enjoy playing the guitar.

He says he is fond of playing the guitar.

He says he was fond of playing the guitar.

I am glad to be seeing you on the concert.

I am glad to see you on the concert.

I was glad to see you on the concert.

I am glad to have seen you on the concert.

Reading my favourite hobby.

Reading is my favourite hobby.

Reading is a favourite hobby.

Reading is favourite hobby.

How long does it take you to get to your college?

How much time does it take you to get to your college?

How many time does it take you to get to your college?

How much did it take you to get to your college?

Thank you for visited us.

Thank for having visited us.

Thank you for having visited us.

Thank you having visited us.

He said he writes the letter in time.

He said he will write the letter in time.

He says he would write the letter in time.

He said that he would write the letter in time.

Did you see this film?

Have you already seen this film?

Were you see this film?

Do you see this film?

I am very sorry to offend you.

I am very sorry to have offended you.

 I was very sorry to offend you.

I am very sorry to be offending you.