Loại 1: If + S + V (s,es), S + Will/Can/shall… + V

Loại 2: If + S + V2/ Ved, S + Would/ Could/ Should… + V

Loại 3: If + S + Had + V(pp)/Ved, S + would/ could… + have + V(pp)/Ved

Áp dụng ta có:

1/ will give (loại 1)

2/ would type (loại 2)

3/ would have visited (loại 3)

4/ attended (loại 2)

5/ knew (loại 2)

6/ had arrived (loại 3)

7/ wouldn't make (loại 2)

8/ were (loại 2)

9/ find (loại 1)

10/ would be (loại 2)

1. If I see him , I __will give____ (give ) him a gift. (câu điều kiện loại 1)

2. If I had a typewriter, I __would type___ (type) it myself.(loại 2)

3. If I had known that you were in hospital, I __would have visited___ (visit) you. (loại 3)

4. You could make better progress if you _attended____ (attend) class regularly. (loại 2)

5. If I __knew___ (know) his telephone number, I’d give it to you. (loại 2)

6. If you __had arrived___ (arrive) ten minutes earlier, you would have got a seat. (loại 3)

7. If he worked more slowly, he __woudn't make___ (not make) so many mistakes.(loại 2)

8. I shouldn’t drink that wine if I ___were__ (be) you. (loại 2)

9.If I ___find__ (find) a cheap room, I will stay a fortnight. (loại 1)

10. A lot of people __would be_ (be) out of work if the factory closed down. (loại 2)

* Công thức

Loại 1: If + S + V (s,es), S + Will/Can/shall… + V

Loại 2: If + S + V2/ Ved, S + Would/ Could/ Should + V

Loại 3: If + S + Had + V(pp)/Ved, S + would/ could… + have + V(pp)/Ved