grateful的用法及短语

例句：

I can't express how grateful I am.

我说不出我有多么感激。

These refugees are very grateful to the government's succor.

这些难民非常感激政府的'救援。

I am grateful for all your past kindness.

多蒙关照,万分感激。

I'd be grateful if you should let me know as soon as possible.

你若能让我尽快知道,我会很感激的。

The trees afford grateful shade.

这些树能为（行人)提供纳凉之所。