Chọn cấu trúc của câu điều kiện loại 1:

• If + S + V.ed, S + Will/Can/shall…… + V

• If + S + V(s,es), S + Will/Can/shall…… + V

• If + S + V2/V.ed, S + would/ Could/ Should…+ V

• If + S + had + V (P.P), S + would/ Could/ Should + have + V (PP)

If I finish my homework before Saturday, I (go) _____out with my friends.

• would go

• go

• will go

• had gone

Chọn cấu trúc của câu điều kiện loại 2

• If + S + V(s,es), S+ V(s,es)

• 
  If + S + V(s,es), S + will + V

• If + S + had + V (P.P), S + would/ could/ might/ + have + V(P.P)

• If + S + V(P1), S+ would/could/ might + V

If I _____ her phone number, I _____ her last night

• had known/ could have phoned

• knew/ would have phoned

• know/ could phoned

• knew/ could phone

If the wall weren't so high, he _____ it up to take his ball down.

• climbed

• could climb

• climb

• is climbing

If he ______ the truth, the police wouldn’t arrest him.

• tells

• will tell

• would tell

• told

John _____ win more races if he trained harder.

• will

• can

• be

• would

If I had a typewriter, I ​ (a)   it myself.

• would
• typed
• would have typed
• type
• will type

Câu điều kiện loại 3 là:

• Câu điều kiện không có thật ở quá khứ

• Câu điều kiện có thật ở hiện tại

• Câu điều kiện không có thật ở hiện tại.

• Câu điều kiện sẽ xảy ra ở tương lai.

If he had got up early yesterday morning, he ______ the bus.

• missed

• won't miss

• wouldn't have missed

• wouldn't miss