Cấu trúc câu điều kiện trong tiếng anh

ONTHIONLINE.NET
Các trường hợp đặc biệt của câu điều kiện
Use:
If +S + had done + LAST/AGO, S +could/would + do+ NOW
Other wise/ or / orelse == if + S + V, S+V
----Trái ngược với những gì đã nói đến ở trên và bằng một mệnh đề điều kiện
Ex:
+ I haven't got any money left, other wise I would gave you.
+ I didn't know you came, orelse I would have waited for you.
+ You have to learn hard, or you will fail the exam.
If/unless/ as long as ......now/today(loại 2)
If/unless/ as long as ......last/ago(loại 3)
Ex:
++If/he/here/now/he/help/us/solve/problem
=>If he were here now, he would help us to solve this problem.
++If/he/build/ house/last year/ save/ lot/money/now
If he had built his house last year, he would saved a lot of money now.
Đổi câu:
Unless = If ...not...
Ex:
+If he doesn't come, we'll go without him.
=> Unless he does come, we'll go without him
+If he continues to smoke, he'll die.
=> Unless he stops smoking, he'll die.

Chuyển đổi câu điều kiện
Sb+ can/wil+l do st+ by+ V-ing
==>If sb+ V, he can/will do st
Ex:
+I can save a lot of time by booking the ticket on phone.
=>If I book the ticket on phone, I can save a lot of time.

+ by working hard he could have earned a lot of money.
=>If he worked hard, he could have earned a lot of money.
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Sb + has to/ must/ should/ had better/ ought to+ do st, or/ other wise + st+ will happen
==> If sb doesn't do st, St will happen
Ex:
+ We have to leave now, or we'll miss the train.
=> If we don't leave now, we'll miss the train.
Do st/ Don't do st + or st will happen/ If you don't want st to happen.
==> If you + don't do st/ do st, will happen.
Ex:
+Be careful, or you'll fall down
=>If you aren't careful, you 'll fall down.
+ Don't wake her up, she'll be angry.
=>If you do to wake her up, she will be angry.
Reason, result==> If not reason, not result( dạng2 dang3 hoặc dạng hỗn hợp)
Ex:
+ I can't buy this computer because I haven't got enough money.
=> If I had enough money, I could buy this computer.
+He ignored the traffic light, so he had an accident.
=> If he hadn't ignored the traffic light , he wouldn't have had an accident.
+ You are tired now because you stayed up late last night.
=> If you hadn't stayed up late last night, you wouldn't be tired now
Without N + st will happen/ st would happen /st would have happend

==>
If +( S+V) (not N)
.............................Does, st will happen
.............................did/were, st would happen
.............................had done, st would have happen
Ex:
+ The without your help, I'll fail again.
=> If I don't have your help, I'll fail again.
+ Without the sun, There would be no life on the Earth.
=>If there weren't the sun, There would be no life on the Earth.

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