If you don’t ask me for the car, I will lend it to you.
=>Unless 
, I won’t lend it to you.
Giải bởi Vietjack
Trả lời:
Để thay thể If.. not bằng Unless, ta chuyển mệnh đề chứa If từ dạng phủ định về dạng khẳng định
Cấu trúc: If + S + don’t/ doesn’t + V = Unless + S + V(s,es)
=>Unless you ask me for the car, I won’t lend it to you.
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David will leave for Hanoi tomorrow if the weather
(be) fine.
Please don’t disturb him if he 
(be) busy.
You must leave home early or you will late.
If you 
, you won’t late.
We’ll have to go without John if he (not arrive) 
soon.
I’ll call the teacher if you don’t leave me alone. Unless , I’ll call the teacher.
Walk faster or you will miss the bus.
=>If you , you won’t miss the bus.
What will you do if you (not / go) away for the weekend?
I won’t enjoy the film if you aren’t with me.
=>Unless , I won’t enjoy the film.
If she (accept) your card and roses, things will be very much hopeful.
If you (be) scared of spiders, don’t go into the garden.
The game (start) if you put a coin in the slot.
Don’t go out in the rain because you will get wet.
=>If you , you will get wet.
If she (come) late again, she’ll lose her job.
If he (wash) 
my car, I’ll give him $20.
If a holiday (fall) on a weekend, go to the beach.
