Task 1:

1. I wish I could help you.

S + wish(es) + S + could + V1 : ước ở hiện tại

2. Mary wishes she would be able to attend your wedding next week.

S + wish(es) + S + would+ V1 : ước ở tương lai 

3. He wishes he had a computer at home.

S + wish(es) + S + V2/ed : ước ở hiện tại

Task 2:

1. Mary asked Tom if he went to school by bicycle.

S + asked + O + if/whether + S + V (lùi thì)

HTD --> QKD

2. A foreigner asked us if we could speak English.

S + asked + O + if/whether + S + V (lùi thì)

can --> could

3. Mrs. Mi asked me what time he would come.

S + asked + O + Wh+ S + V (lùi thì)

will --> would

`color{orange}{~LeAiFuRuiHuiBao~}`