4. be sure to do sth./ be sure of/about sb. or sth.

(1)be sure to do sth.可以用来表示说话人给对方提出要求，意思是“务必”，也可以用来表示说话人做出的推断，意思是“一定”，“肯定”。例如：

Be sure to lock the door when you leave.你离开时务必把门锁好。

It's a good film. You are sure to enjoy it.这是一部好电影，你肯定会喜欢的。

(2)be sure of/about sb.or sth.  可用来表示“某人对某事有把握”。例如：

I'm sure of his success.我相信他会成功。

I think it was three years ago, but I'm not sure about it.我想那是三年前的事情，但我没有把握。

5. hear from/hear of

hear意思是“听到”，从哪里听到要用from来表示。例如：

I've heard from Xiao Wu that we'll start out military training tomorrow.

我听小吴说，我们明天开始军训。

Listen to the tape and write out what you hear from Han Mei.

听录音，并写出你从韩梅那里听到的内容。

hear from还有一个意思是“收到某人的来信”（=receive a letter from sb.）。例如：

I heard from my pen friend in the U.S.A. last month.

上个月我受到了美国笔友的来信。

I heard from her last week. 我上周接到了她的来信。

hear of和和hear from含义不同。hear of 意思是“听说”，“得知”（某事或某人的存在），常用在疑问句和否定句里。例如：

Who is he? I've never heard of him.他是谁？我从来没有听说过他。

I never heard of such a thing! 这样的事我从来没有听说过。

6. It's a pleasure./With pleasure.

It's a pleasure这句话常用作别人向你表示致谢时的答语，意思是“那是我乐意做的”。例如：

---Thank you for helping me. 谢谢你地帮助。

---It's a pleasure. 那是我乐意做的。

---Thanks a lot. Bye.非常感谢。 再见。

---It's a pleasure. 那是我乐意做的。再见。

类似的话还有 "Not at all." "You are welcome." "That's all right."

With pleasure也用作客气的答语，主要用在别人要你做某事，而你又非常愿意去做的场合。例如：

---Will you please pass me the newspaper, please?

请你把报纸递给我好吗？

---With pleasure.

当然可以。

7. seem/look

(1)二者都可以作“看起来”讲，但seem暗示凭借一些迹象作出的有根据的判断，这种判断往往接近事实；look着重强调由视觉得出的印象。两者都可跟(to be)+形容词和as if从句。如：

He seems / looks (to be) very happy today. 他今天看起来很高兴。
It looks (seems) as if it it is going to rain. 好像要下雨了。

(2)但下列情况中只用seem不用look：

1)后跟不定式to do时。如：

He seems to know the answer. 他似乎知道答案。

2)在It seems that ...结构中。如：

It seems that he is happier now than yesterday.他像比昨天高兴些了。

上一页  [1] [2] [3] [4] [5] [6] [7] [8] [9] [10]  ... 下一页  >>