IF ONLY 在句首是个什么意思？后面有什么语法？

Question

如题所述

Answer 1

If only...! 真希望……!若是……那该多好啊!
之后常用虚拟语气，例如：

(1) 谓语动词用过去式表现在：如：
例：If only I knew his name! 要是我知道他的名字就好了。
(2) 谓语动词用过去完成时表过去：如：
例：If only we had followed your advice! 我们要是采纳你的意见就好了。
(3) 谓语动词用could/would表将来：如：
例：If only I could see him again! 要是我能再看到他多好啊！
If only she would accept my invitation!

Answer 2

“要是……就好了”，后面用虚拟语气。例如：If only I were a bird.

Answer 3

意思是“要是……多好”。虚拟语气：If only I were you.如果我是你