Chuyên đề câu điều kiện

Conditional sentences
TYPE IF CLAUSE MAIN CLAUSE
3. Unreal in
the past

Past perfect
Would/ could/ might +
have +V
-ed/P2
1. Real in
the
present/
future
Present
simple
Will/ can/ may +
V
bare – inf
2. Unreal in
the present
Past simple
Would/ could/ might +
V
bare -inf
2
1
3

Put the verbs in the correct form
1.If I made a promise, I (keep) _________ it.
2.If we had known your address, we (write)
_______________ you a letter.
3.If you come here in Spring, you (have)_______
a chance to go to the village fair.
4.I (not do)__________ that if I (be) ____ you.
5.You were late last night. If you (arrive)
_________ ten minutes earlier, you (get)
____________ a seat.
6. 6. Can I borrow the dictionary if he
(finish) _______
it?
would keep
would have written
will have
would not do
were
had arrived
would have got
finishes

I.Tenses
Simple present in the main clause:
Ex: If you heat ice, it turns to water.
Progressive tense:
Ex: If I were sitting on the car, I would feel carsick.
Perfect tense: Ex: If I have finished the letter, I’ll post it.
Be going to/ have to/ .…
Ex: If you are going to leave, I won’t say anything.

 ‘Should in the conditional clause:’
Ex: if she should agree to do it, please call me.

II. Replace “IF”
Unless (trõ khi, nÕu kh«ng) = If not……
Ex: My wife will be very upset if I don’t get back
tomorrow.
-> My wife will be very upset unless I get back
tomorrow.
MÖnh ®Ò Unless lu«n ë thÓ kh¼ng ®Þnh.
 Kh«ng dïng th× t$¬ng lai trong mÖnh ®Ò Unless

Provided/ Providing that, on condition
that, as long as (miÔn lµ), suppose (gi¶ sö nh$),
only if (chØ víi ®iÒu kiÖn lµ), but for + noun(nÕu
kh«ng) .…
Ex:
1, I ll do all thing ’ as long as she is happy.
2, Provided that you know her address, will you
help me to give her this book?
II. Replace “IF”

Inversion:
Chỉ dùng đảo ngữ trong mệnh đề IF
Không dùng dạng rút gọn trong mệnh đề đảo ngữ
phủ định
Ex: Hadnt he asked me, hed have asked you
Had he not asked me, hed have asked you
.
II. Replace IF

Exercise: Rewrite these sentences beginning the
given word:
1. If Tom had understood what I said, he’d have
come back. (Had……….)
->Had Tom understood what I said, he’d have
come back.
2. If he meets Mary, he will call you.
(Should………)
->Should he meet Mary, I will call you.
3. If I had much money, I would buy that village.
( Were………….)
->Were I to have much money, I would buy that
village.

III.Mixed condition
Situation: I didn’t eat breakfast this morning, I am
hungry now. (If… )
-> If I had eaten breakfast this morning, I would not be
hungry now.
(type 3 & type 2)
Situation: He has a test to do today, so he couldn’t go
out for picnic with his friends yesterday. (If… )
-> If he didn’t have a test to do today, he could have
gone out for picnic with his friends yesterday.
(type 2 & type 3)

1.If I were a King, you would be a Queen.
2.Were I a bird, I would be a dove.
3.If he looks at me, I will be shy.
4.He wouldn’t have failed the exams if he
had studied harder.
5.Unless he swears, I won’t believe him.