eg. You must have been drinking when I called you last night. (过去的某一时刻) 昨晚我打电话给你时你一定是在喝酒。 You must have been watcher TV yesterday afternoon. (过去的某一时刻) 昨晚下午你一定是在喝酒。 You must have been preparing for the meeting in the last two weeks.(过去一直到现在的一段时间) 过去的两周内你们一定是在为这次会议做准备． at seventy miles an hour 以每小时70英里的速度 表示速度用at. at the speed of seventy miles an hour. 以每小时70英里的速度 at 1000 miles a second 以每秒1000英里的速度 at 100 meters a minute 以每分钟100米的速度 a(an) = per 每 at 200 kilometers per hour 以每小时200公里的速度 C: I can't have been.
我不会开得那么快的。
can’t (must表猜测时的否定形式)不可能 eg. He can’t be in London. I saw him here only this morning. 他不可能在伦敦，我今儿早还在这见到他的。 You can’t be at home. I can hear the noise of the train. 你不可能在家，我都能听见火车的声音。 They can’t have finished their job yesterday. 他们不可能昨天把活儿干完。 You can’t have been staying alone. 你不可能是一直一个人呆着。 B: I was doing eighty when I overtook you. 我是以每小时80英里的速度赶上你的。
I was doing eighty.=I was driving at eighty miles an hour. ...when I overtook you. 当我超过你的时候。 overtake 超过 catch up with 追上，赶上 keep up with 跟上(保持一致) B: Didn't you see the speed limit?
难道你没看见限速牌吗？
C: I'm afraid I didn't, officer. I must have been dreaming.
恐怕我没有看见，警官。我一定思想开小差了。
Didn’t you see the speed limit? 难道你没看见限速牌吗？ I didn’t =I didn’t see the speed limit. 作I am afraid that 的宾语。 I must have been dreaming. 我当时一定是在做梦。 dream n. 梦; v. 做梦 dream a dream 做一个梦 这里引申为“思 想 开小差。” A: He wasn't dreaming, officer. I was telling him to drive slowly.
警官，他思想没有开小差。我刚才正告诉他开慢点。 He wasn’t dreaming. 他思想没在开小差，即他是认真做事的。 was telling 用进行时态加强语气证明“我一直都在告诉他”。 tell sb to do sth 告诉（叫）某人做… tell him to stop. 叫他停下来。 tell him to come closer. 叫他走近点。 C: That's why I didn't see the sign. 所以我才没看见那牌子。
why引导名词从句作表语。 That’s why…. ”所以“（用于解释原因） eg. That’s why I was late.
(这就是我迟到的原因) That’s why I am angry. 这就是我生气的原因。 B: Let me see your driving licence.
让我看一看你的驾驶执照。 Let sb do sth 让某人做某事 Let me have a look. 让我看一下。 Let me tell you the reason. 让我告诉你原因吧！ driving licence= driver’s licence 驾驶证 practice licence 营业执照 B: I won't charge you this time. But you'd better not do it again! 这次我就不罚你款了。但你最好不要再开得这样快。 charge you 罚你的款 this time 这次 that time 那次 every time 每次每当 next time 下次 You’d better =you had better had better do sth 最好做某事（表建议） eg. You’d better come back early. 你最好早点回来。
