1) we (meet)………………. at 9:30, we...........( have) plenty of time. 2) Lisa (find)………… the milk if she...........(look) in the fridge. 3) The zookeeper (punish)…………. her with a fine if she...........(feed) the animals. 4) you (speak)……………… louder, your classmates...........(understand) you. 5) Dan...........(arrive) safely if he drove slowly. 6) You...........( have) no trouble at school if you (do)………….. your homework. 7) you...........(swim) in this lake, you (shiver)………… from cold. 8) The door (unlock) ………..if you...........(press) the green button. 9) Mel...........(ask) her teacher, he (answer)……… her questions. 10) I....................(call) the office if I (be)………….. you.

1) If we meet at 9:30, we.....will have......(to have) plenty of time.

2) Lisa would find the milk if she.....looked......(to look) in the fridge.

3) The zookeeper would have punished her with a fine if she.....had fed......(to feed) the animals.

4) If you spoke louder, your classmates.....would......(to understand) you.

5) Dan.....would arrive......(to arrive) safe if he drove slowly.

6) You....will have......(to have) no trouble at school if you had done your homework.

7) If you.....swim......(to swim) in this lake, you'll shiver from cold.

8) The door will unlock if you....press.......(to press) the green button.

9) If Mel......had asked.....(to ask) her teacher, he'd have answered her questions.

10)I would call to the office if were you.

Đây là cấu trúc các câu trên

-Câu điều kiện loại 1:  [If + thì hiện tại đơn],  [will + động từ nguyên mẫu]

-Câu điều kiện loại 2:  [If + thì quá khứ đơn],  [would + động từ nguyên mẫu]

-Câu điều kiện loại 3:  [If + thì quá khứ hoàn thành],  [would + have + V3/V-ed]