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。)