三、其后不直接跟if或when引导的从句，若语义上需要接这类从句，需借助it。

I would appreciate it very much if you would help me with it.
如果你能帮助我做这事，我会十分感激。

We really appreciate it when she offered to help.
她来帮忙了，我们十分感激。

四、修饰语

要表示程度，可用 deeply, highly, (very) much 等副词修饰。如：

I deeply appreciate your kindness.
我深深感谢你的好意。

He highly appreciated their help.
他非常感谢他们的帮助。

注意：much 修饰 appreciate时，只能置于其前，而不能置于其后，但 very much 却可以：

We much appreciate your invitation.
=We appreciate your invitation very much.
我们非常感谢你的邀请。