19.6 条件状语从句 |
连接词主要有if,unless,as/so long as,on condition that等。 if引导的条件句有真实条件句和非真实条件句两种。非真实条件句已在虚拟语气中阐述。 unless=if not Let's go out for a walk unless you are too tired. If you are not too tied,let's go out for a walk. 典型例题 You will be late ___ you leave immediately. a.unless B.until C.if D.or 答案A。句意:除非你立即走,否则你就回迟到的。可转化为 If you dong leave immediately,you will be late.B、D句意不对,or表转折,句子如为 You leave immediately or you will be late. |