如果从句里含有should,had,were或其他助动词,则可将从属连词if省去,将助动词.情态动词.be或have放在句首形成部分倒装.
Eg.Were he in your position,he’d have done the same.
Had I had time,I would have done that yesterday.
Should he come tomorrow,I should give him the dictionary.
(1) 错综时间虚拟句
通常情况下,在非真实条件句中主句和从句的谓语动词所指时间是一致的,但有时也可能指不同的时间,这时要根据上下文的意思采用不同的谓语动词形式.P 116,2
Eg.If I were you,I would have taken his advice.(从句指现在,主句指过去)
If I had taken my raincoat with me this morning,I would not be wet now.(从句指过去,主句指现在).