您好，我感觉不舒服，可能是感冒了。
B: How long have you been feeling like this?
这种情况维持多久了?
A: 3 days already.
已经3天了。
A: How do you feel?
你感觉怎么样?
B: I don't feel like eating anything. I feel like vomiting.
我什么也不想吃，想吐。
A: How long has this been going on?
你这样有多久了?
B: For one day.
一天。