`3`/ would have visited

`4`/ attended

`5`/ knew

`6`/ had arrived

`7`/ wouldn't make

`8`/ were ( đặt biệt ở điều kiện `2`, was `->` were ở tất cả chủ ngữ )

`9`/ find

`10`/ would be

Exercise `2`: 

`1`/ If you dont keep silent, you will wake the baby up

`2`/ If you dont stop talking, you will not understand the lesson.

`3`/ If i dont know her numeber, I will not ring her up.

`4`/ If i dont know the answer, i will not tell you.

`5`/ If we had a map, we wouldn't be lost.

Công thức điều kiện `1`:

S + v infinite / s or es + O ,... + S + will + v infinite 

Công thức điều kiện loại `2`:

S + Vɪɪ + O,... + S + would + v infinite.

was `->` were ở tất cả chủ ngữ.

Công thức điều kiện loại `3`:

S + had + Vɪɪɪ + O,...+ S + would + have + Vɪɪɪ.