$2.$ We would have helped him if he had asked us to help.

$3.$ If Tom were taller, he could reach the shelf.

$4.$ If Joe weren't a nephew of the director, he wouldn't have been promoted.

$5.$ If you hadn't helped us, we wouldn't have been able to get a job.

$6.$ If he had had breakfast this morning, he wouldn't feel hungry now.

$7.$ I won't leave unless you tell me the reason.

Câu điều kiện loại $1$ `:`

`⇒` If `+` S `+` V ( s `/` es ) , S `+` will `+` V_inf `+` O.

Câu điều kiện loại $2$ `:`

`⇒` If `+` S `+` V2 `/` V`-`ed , S `+` would `/` could `/` should `+` V_inf `+` O.

Câu điều kiện loại $3$ `:`

`⇒` If `+` S `+` had `+` V3 `/` V`-`ed , S `+` would `/` could `/` could `+` have `+` V3 `/` V`-`ed + O.

=>
2. We would have helped him if he had asked us to help.
3. If Tom were taller, he could reach the shelf.
4. If Joe weren't a nephew of the director, he wouldn't have been promoted.
5. If you hadn't helped us, we wouldn't have been able to get a job.
6. If he had had breakfast this morning, he wouldn't feel (so) hungry now.
7. I won't leave unless you tell me the reason.
Câu đk loại 1 : If S Vs/es, S will/can (not) V (unless ~ if not)
Câu đk loại 2 : If S V2/ed, S would/could (not) V
Câu đk loại 3 : If S had (not) V3/ed, S would/could (not) have V3/ed
Câu đk hỗn hợp : If S had (not) V3/ed, S would (not) V
If S V2/ed, S would (not) have V3/ed