A：I'll help you with your homework.

我来帮你写家庭作业。

B：I appreciate that.

非常感激。

注释：

a.appreciate vt. 感激

例：I appreciate your help.

(我很感激你的帮助。)

b.以下是表示“感激”的形容词的用法：

be very thankful/grateful/obliged to + 人+ for+事物感激某人某事物

例：I'm very thankful to you for your help.

=I'm Very grateful to you for your help.

=I'm very obliged to you for your help.

(我非常感激你的帮忙。)