A：Are you free tonight?
    你今晚有空嗎?
    A：I think so.
    我想有吧。
    注釋：
    a.free a. 有空的
    = available
    Are you free now?
    = Are you available now?
    = Are you off now?
    (你現(xiàn)在有空嗎?)
    b.I think so.我想是吧。
    I don't think so.
    我想不是吧。/我不這么認(rèn)為。
    A: Is she beautiful?
    (甲：她美嗎?)
    B: No, I don't think so.
    (乙：不，我不這么認(rèn)為。)