If only Jack had dropped out of school when he was 15.

If Jack dropped out of school when he was 15, he would regret it.

Jack wishes he hadn’t dropped out of school when he was 15.

Jack regrets not having dropped out of school when he was 15.

Lan wishes she had applied for the job in the library.

Lan wishes she have applied for the job in the library.

Lan wishes she has applied for the job in the library.

Lan wishes she applies for the job in the library.

I wish I book the seats in advance.

If only I booked the seats in advance.

I wish I have booked the seats in advance.

If only I had booked the seats in advance

I could have seen Susan off at the airport.

If only I had seen Susan off at the airport.

That I did not see Susan off at the airport escapes me now.

It suddenly dawns on me that I should have seen Susan off at the airport

She wishes the children are not noisy and she can concentrate on working.

In case the children are not noisy, she can concentrate on working.

If the children were not noisy, she can concentrate on working.

If only the children were not noisy and she could concentrate on working.

If my laptop is not broken, I could use it for my online learning.

In case my laptop was not broken, I could use it for my online learning.

If only my laptop had not been broken, I could have used it for my online learning.

I wish my laptop were not broken, I could use it for my online learning.

If only I had more time yesterday, I could complete my homework.

As soon as I didn’t have more time yesterday, I couldn’t complete my homework.

If I had more time yesterday, I could have completed my homework.

I wish I had had more time yesterday, I could have completed my homework.

Unless you paid attention in the class, you won't understand the lesson.

I wish you pay attention in the class, you will understand the lesson.

As long as you didn’t pay attention in the class, you would understand the lesson.

If only you paid attention in the class, you would understand the lesson.

If the teacher is not busy today, she can help her students.

She wishes the teacher were not busy today, and she could help her students.

As soon as the teacher is not busy today, she will help her students.

Although the teacher is not busy today, she can’t help her students.

If only Marie turn up at John’s birthday party.

I wish Marie had turned up at John’s birthday party.

I wished Marie wouldn’t turn up at John’s birthday party.

It’s a shame Marie had turned up at John’s birthday party.

I wish I would tell him the truth..

If only I told him the truth.

I wish I havenot told him the truth.

If only I had not told him the truth.

I wish you didn’t give me a chance to tell you the truth.

I wish you gave me a chance to tell you the truth.

I wish you had given me a chance to tell you the truth.

I wish you hadn’t given me a chance to tell you the truth.

As long as I am with you in London right now, I can show you some places of interest.

I wish I were with you in London right now and could show you some places of interest.

If I am with you in London right now, I can show you some places of interest.

If only I had been with you in London right now and could show you some places of interest.

I wish I had gone to the airport to see her off.

If only I would go to the airport to see her off.

I regret to go to the airport to see her off.

If I were you, I would go to the airport to see her off.