If only somebody had told us，we could have warned you.
If only Dad could see now!
If only I had known the news earlier!
跟only搭配的有些结构也可用虚拟式，如only that, only for等，意为“若不是”、“要不
I would come only that I am engaged to dine out.
He would probably have done well in
the examination，only that he gets rather ner-
Only for my tea，I should have had the headache.
9. as it/as though摘构
as if / as though可以引出一个状语从句，也可引出一个表语从句，无论哪一种类型的从
The whole family greeted me as though I were one of the families.
He talked as if he had taken part in the game.
I felt as if I had been with you all along.
She cried as if her heart would break.