Mrs. Brown last went on a trip to Hanoi two years ago.

• Mrs. Brown has gone on a trip to Hanoi for two years.

• Mrs. Brown didn't go on a trip to Hanoi two years ago.

• Mrs. Brown has two years to go on a trip to Hanoi.

• Mrs. Brown hasn't gone on a trip to Hanoi for two years.    

He said to them: “Who will you see before you leave here?”

• He asked them who they would see before they left there.

• He asked them who they would see before they left here.

• He asked them who they would see before you left there. 

• He asked them who you would see before they left there.

I’m sure it wasn’t Mr. Pike you saw because he is in London.

• It mustn’t have been Mr. Pike you saw because he is in London.

• It can’t have been Mr. Pike you saw because he is in London.

• It mightn’t be Mr. Pike you saw because he is in London.

• It couldn’t be Mr. Pike you saw because he is in London.

Jane has some work to do this weekend. She can't attend her sister's wedding.

• If Jane didn't have some work to do this weekend, she could attend her sister's wedding.

• If only Jane had had some work to do this weekend, she could have attended her sister's wedding.

• Provided that Jane has some work to do this weekend, she can't attend her sister's wedding.

• If Jane had some work to do this weekend, she could attend her sister's wedding.

Peter told us about his plan to study abroad. He did it on his arrival at the party.

• Only after his plan to study abroad did Peter inform us of his arrival at the party.

• Not until Peter told us that he would study abroad did he arrive at the party

• Hardly had Peter informed us about his plan to study abroad when he arrived at the party.

• No sooner had Peter arrived at the party than he told us about his plan to study abroad

The last time Peter saw Mary was two months ago.

• Peter has seen Mary for two months.

• Peter has not seen Mary for two months.

• Peter first saw Mary two months ago.      

• Peter saw Mary again two months ago     

“What are you doing at 8 p.m yesterday.” asked my brother.

• My brother asked me what I am doing at 8 p.m the previous day.

• My brother asked me what am I doing at 8 p.m the previous day.

• My brother asked me what I was doing at 8 p.m the previous day.

• My brother asked me what was I doing at 8 p.m the previous day.

It’s not necessary that you do your homework now.

• You shouldn’t do your homework now.   

• You must do your homework now.

• You needn’t do your homework now.

• You cannot do your homework now.

My wife isn’t here now. I want to share the news with her.

•  If only my wife had been here and could have shared the news with me.

• If my wife is here now, she can share the news with me now.

• I wish my wife were here now, so that I could share the news with her.

• As long as my wife is here, she will be able to share the news with me.

Lan had some shocking words on her facebook. Then, everyone knew her.

• Only when Lan had some shocking words on her facebook did everyone know her.

• Hardly Lan had some shocking words on her facebook than everyone knew her.

• Only after Lan had some shocking words on her facebook everyone knew her.

• Until Lan had some shocking words on her facebook did everyone knew her.