3. be sure of/ be sure to do/ be sure that

.be sure of “确信对……有把握”后接名词、代词或动词-ing 形式，表对客观事物有肯定的认识和判断，主语必须是人。如：

As David joined our team, we are sure of winning the game this time.  

由于David参加了我们的球队，我们这次有把握取胜。

You may be sure of his honesty. 你可以确信他的诚实。

.be sure to “一定，肯定”，后接不定式，往往表示局外人的推测，评论，主语不一定是人，如：

It is sure to rain tomorrow. 明天一定会下雨。

He is sure to win.他一定会赢的。

用于祈使句时作“务必，切切”之意，如：

Be sure to come tomorrow. 你明天一定要来

Be sure to forget it . 千万别忘了。

. be sure that 从句。“认为……一定会”主语必须是人，连词that 可省略。它后面还可以接由wheher, 或where, when, who 等引导名词性从句。这时主句通常是否定式。如：

He is wure that he will succeed. 他确信会成功

I am not sure where I left my notebook. 我不能确定我的笔记本丢在什么地方了。

4. be sure/ make sure

. be sure 指某人对某事或对某种情况有把握，常译为：“确信”；make sure 指“务必、务请、确保”将某事弄清楚。如：

I am sure that he is honest. 我相信他是诚实的。

I have made sure that he is honest. 我已了解清楚他是诚实的。

. 二者后面均可接of 或about 引出的短语。如：

I am sure of  success = I am sure that I will succeed.我深信会成功。

Will you make sure of his return? = Will you make sure that he returned? 请你查明他是否真的回来了。好吗？

. make sure 后面的that 从句一般不用或很少用将来时；

   be sure 后面的that从句则可用将来时。如：

Make sure that you come here before five. 你一定要在5点前来。

I am sure that he will come. 我相信他一定会来的。

. 两者后面接不定式，均表示“一定要做某事”，但make  sure 通常只用于祈使句；而be sure 则不受限制。如：

  to come to party on time. 一定要准时来参加晚会。

   He is sure to call you up. 他准会给你打电话的。

5. be surprised/ in surprise

. be surprised 为“动词+形容词”结构，在句中作谓语，意为：“感到吃惊”. be surprised at  表“对……感到吃惊”

. in surprise为“介词+名词”结构。在句中作状语。意为：“吃惊地”。如：

She was surprised. 她感到吃惊。

Everybody was surprised at you. 大家都对你感到吃惊。

John turned round and looked at him in surprise. 约翰转过身去，吃惊地看着他。