TÓM TẮT CÔNG THỨC CÂU ĐIỀU KIỆN

Loại
Mệnh đề phụ ( IF )
Mệnh đề chính

1A
IF + S + V1/S/ES + ......,
S + V1/S/ES + ......

1B
IF + S + V1/S/ES + ......,
S + WILL V0 + ......

2
IF + S + WERE / V2/ED + ......,
S + WOULD V0 + ......

3
IF + S + HAD V3/ED + ......,
S + WOULD HAVE V3 /ED + ......


HAD + S + V3/ED + ......,




Lưu ý: Chữ IF: NẾU; chữ UNLESS: NẾU KHÔNG; chữ OR:... HOẶC LÀ...... NẾU KHÔNG/ ... NẾU KHÔNG...
Do đó: 1) IF + Mệnh đề khẳng định = UNLESS + Mệnh đề phủ định
2) IF + Mệnh đề phủ định = UNLESS + Mệnh đề khẳng định
Cách dịch đối với câu dùng UNLESS / OR:
Nếu UNLESS ( hoặc OR) đặt đầu câu thì dịch mệnh đề chính ( mệnh đề bên phải dấu phẩy) trước.
Nếu UNLESS ( hoặc OR) đặt giữa câu thì dịch từ trái qua phải.

BÀI TẬP ÁP DỤNG

Hãy chọn một câu trả lời đúng nhất (A, B, C hoặc D) cho mỗi câu tương ứng dưới đây:
If the train is late, we………………….. to the office.
A) walk B) will walk C) would walk D) walks
She…………………….. if she has time.
A) calls B) would call C) will call D) calling
If it…………………..…. too much, I will buy the smaller one.
A) costs B) will cost C) would cost D) cost
If the class……………………….. full, we will find another one.
A) are B) will be C) were D) is
What will we do if the taxi…………………….….?
A) don’t come B) didn’t come C) doesn’t come D) had not come
If it snowed this summer, we…………………… skiing.
A) goes B) will go C) would go D) go
If you drove more carefully, you…………..……..so many accidents.
A) would not have B) will not have C) wouldn’t have had D) has
If he……………..………… up earlier, he’d get to work on time.
A) gets B) will get C) got D) had got
I would tell you more about it if we……………………………… more time.
A) has B) will have C) have D) had
If I……………….…….you, I wouldn’t worry about going to university.
A) am B) be C) were D) had been
If you………………….…….. any money, I’d give you some.
A) hadn’t had B) haven’t had C) don’t have D) didn’t have
You’d earn more money if you…………………. more products.
A) to sell B) sell C) sold D) will sell
If I……………………. so busy yesterday, I would have visited you.
A) were not B) wasn’t C) aren’t D) hadn’t been
If you had seen the film, you………….……… it.
A) will enjoy B) would have enjoyed C) would enjoy D) enjoyed
She would have gone to the university if she……………… the opportunity.
A) has B) will have C) had had D) had
If he had been more careful, he…………….…………. an accident.
A) would not have had B) will not have C) does not have D) would not have
If you’d stayed at home, there …………………………. any trouble.
A) would not be B) will not be C) is not D) would not have been
What would you do if he………………….…… tomorrow?
A) resigned B) will resign C) resigns D) to resign
I’ll do it if he…………………….……. me.
A) asking B) will ask C) asked D) asks
If you…………..…….. for the car, we’d be able to sell it.
A) look B) looks C) looked D) had looked
I wouldn’t have believed it if I………………… it with my own eyes.
A) not to see B) didn’t see C) don’t see D) hadn’t seen
What ………….… if you found a burglar in your house?
A) will you do B) do you do C) would you do D) you do
If