你能这样说真好用英语怎么说

It is really good of you to say like this.

It's very kind of you to say so.
It's very kind of you to do sth 你做某事太好了（这是一种固定用法）

祝你进步！

It's so sweet you can see this.

it's really nice of you to saying so.

It is so nice for you to say so.

it is nice of you to say so!用of而不是for