•We'll have to leave fairly promptly (= on time) if we want to catch that train.如果我们要赶那班火车，就得准时出发。

•We try to answer readers' letters as promptly (= quickly) as we can.我们努力尽快答覆读者来信。

•She promised she'd keep it secret and promptly (= immediately after) went and told Ben!她答应了要保密，随后却立即告诉了班！