If clauses- type 1,2,3.

Conditional sentences
Ex:
I will buy a house if I have money
(if I have money, I will buy a house )
-Mệnh đề if có thể đứng trước
hoặc sau mệnh đề chính . Nếu mệnh đề if
đặt trước mệnh đề chính thì sau nó có dấu phẩy
-Câu điều kiện gồm có hai phần :
main clause và if clause
Main clause
If clause
If clause
Main clause
Past simple
V2/ed
(to be →WERE)
Present conditional
Would V-bare
Could
Giả thiết trái ngược với sự thật
ở hiện tại
If I were rich, I would help
the poor
Past perfect
Had + V 3/ ed
Perfect conditional
Would + have + V3/ed
Could
Giả thiết trái ngược với sự thật
trong qúa khứ
If Van Quyen had not bet on
football,he would not have been
in prison
Present simple
V-bare / V s / es
Simple future
Will+ V bare
Giả thiết có thể xảy ra ở hiện tại
hoặc tương lai
If you study hard, you will pass
the exam
Task 1 : Use the correct verb tenses :
If I see him , I (give ) him a gift
If I had a typewriter, I (type) it myself
If I had known that you were in hospital, I (visit) you
You could make better progress if you (attend) class regularly
If I (know) his telephone number, I’d give it to you
If you (arrive) ten minutes earlier, you would have got a seat
will give
would type
would have visited
attended
knew
had arrived
Task 2: make conditional sentences
Keep silent or you’ll wake the baby up
If
Stop talking or you won’t understand the lesson
If
I don’t know her number, so I don’t ring her up
If
I don’t know the answer, so I can’t tell you
If
We got lost because we didn’t have a map
If

you don’t keep silent , you will wake the baby up
you don’t stop talking , you won’t understand the lesson
I knew her number, I would ring her up
I knew the answer, I could tell you
we had had a map, we would not have got lost
His friends were so late, so they missed the train
If

Today isn’t Sunday, so the pupils cant go swimming
If
It is very cold , so we can’t go swimming
If
It was very cold yesterday, so we couldn’t go swimming
If

I didn’t watch TV last night because I was busy
If

his friends had not been so late, they would not
have missed the train
today were Sunday, the pupils could go swimming
It were not (very) cold, we could go swimming
It had not been (very) cold yesterday, we could
have gone swimming
I had not been busy , I would have watched TV
last night
Cách đặt điều kiện trái ngược tình huống cho trước:
Chọn câu chỉ nguyên nhân ,
Đặt giả thiết trái ngược với nguyên nhân đó ,
Chọn loại điều kiện thích hợp:
Động từ (trong câu tình huống) ở mệnh lệnh → điều kiện loại 1
Động từ ở hiện tại → điều kiện 2
Động từ ở quá khứ → điều kiện 3
Cách dùng UNLESS:
EX:
If you do not study hard, you will fail the exam

Unless you study hard , you will fail the exam
UNLESS +
S +
VERB
(Nếu ….không)
Practice: Use UNLESS instead of IF
If you do not like this one, I’ll bring you another
Unless
If she does not hurry, she’ll be late
Unless
If you are not careful, you’ll cut yourself
Unless
if you had not sneezed, he wouldn’t have known that we were there

you like this one, i’ll bring you another
she hurries, she’ll be late
you are careful, you’ll cut yourself
Unless you had sneezed , he wouldn’t …..
QUIZ 1
Because you don’t leave immediately, I call a policeman
If
Go right now or you’ll be late for the train
If

His friends were so late, so they missed the train
If
you left immediately , I wouldn’t call a policeman
his friends had not been late,
they would not have missed the train
you don’t go right now, you will be late for
the train