1、I don't know for sure.
我不确定。
例I think so, but I don't know for sure.
我想是吧，不过我不敢肯定。
情景对话
Stranger: Could you tell me how to get to the airport?
路人：您能告诉我怎么去机场吗？
Alice: I don't know for sure. Maybe you could ask the policeman over there.
爱丽丝：我不太确定，也许你可以问问那边的警察。
2、You can count on it.
你尽管相信好了，尽管放心。
例You can count on it that he is very smart.
你就相信吧，他非常聪明的。
情景对话
Mary: Do you think he will come to my birthday party?
玛丽：你觉得他会来参加我的生日聚会吗？
Joe: You can count on it.
乔伊：你放心吧。
3、I'm not going to kid you.
我不是跟你开玩笑的。
例 I'm not going to kid you, this journey is going to be hard.
我不是在跟你开玩笑，这段旅程会很艰辛。
情景对话
Alice: You divorced? You are kidding.
爱丽丝：你离婚了？你在开玩笑吧！
Jack: I'm not going to kid you. I’m serious.
杰克：我不是在跟你开玩笑，我是说真的。
4、I'm broke.
我身无分文。
例 I'm broke. Can you lend me some money?
我破产了，你能借我一些钱吗？
情景对话
Richard：Have you ever thought about buying a car?
理查德：你想过买车吗？
Kevin: Yeah, I've thought about that, but I can't afford a new car. I'm broke.
凯文：想过，但是现在买不起呀，我破产了。
5、Do you really mean it?
此话当真？
例 Sam: Please, do you really mean it?
山姆：拜托，你是说真的吗？
情景对话
Mary: Whenever you are short of money, just come to me.
玛丽：你要是缺钱了，尽管找我借。
David: Do you really mean it?
大卫：此话当真？