A：You seem to be very tired.
你看起来很累啊。
B：Yes, I have been working for eight hours.
是的，我已经工作了8个小时了。
A：Why don't you join us to go out for a walk?
要不要和我们一起去散散步?
B：No, really. I'm not in the mood for it.
真的不行，我没那个心情。