连词有:if, unless, as long as
(1) if引导的条件状语从句 翻译为:"如果", 时态遵循主将从现,可以与祈使句进行转换,如:
If he said that,he can't be telling the truth.
如果他说了那样的话,他不可能是说实话。
You ____________ (pass) the exam if you _________ (study) hard.
= _______________________________________________________________.
Hurry up, or you'll be late.
= _____________________________________________________.
(2) unless"除非"或"如果......不"引导的条件状语从句
unless引导的是否定条件状语从句,在意义上相当于if...not,而且语气较强,一般不用于虚拟语气。如:
You'll be late unless you hurry.
= _____________________________________________________.
你会迟到的,如果不赶快的话。
(3) as long as意为"只要;如果"。如:
__________________________________, we can play.
只要不下雨我们就能玩。
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