【实用口语】 It's on the house. 这是免费的。 He's down and out. 他已经穷困潦倒了。 It's very thoughtful of you. 你想得真周到。 I stand corrected. 我认错。 I rest my case. 我要说的说完了。 You haven't seen anything yet. 好戏还在后头呢! You'll know when the time comes. 到时候就知道了。 If you don't go after what you want, you'll never have it. If you don't ask, the answer is always no. If you don't step forward, you're always in the same place. 如果不去追逐你所渴求,你将永远不会拥有。如果不开口问,答案永远是No。如果不往前走,就将永远停留原地。