be sure的用法
对be sure的用法常感困惑不解，现将其主要用法归纳如下。
1．be sure＋of／about+动名词或名词，意为“确信……”；“对……有把握”。但在接名词时，be sure of侧重指主语对某抽象事物的确信无疑；而be sure about则侧重指主语对某具体事物的确信无疑。例如：
He is sure of success．他自信会成功的。 I'm sure of his honesty．我肯定他是诚实的。
However，he went on to explain that he was not sure about two things—the grammar and some of the idioms．不过，他接着就解释说，他在语法和某些习惯用语方面都没多大把握。
If you are not sure about the situation in the world，you can read the newspaper every day．如果你对世界形势不大了解，你可以每天看看报纸。
若后面要接反身代词，则只能用be sure of，即be sure of oneself，意为“有自信心”。例如：
Joan will sit for an important examination next week，but she is not sure of herself．琼下周要参加一个重要考试，但她对自己没有十分把握。
2．be sure+不定式，表示说话人对句子主语作出的判断，认为句子主语“必定”、“必然会”、“准会”如何如何。例如：
It is sure to rain．天一定会下雨。
He is sure to have known about that．他准会知道那件事。
He told me I was sure to get a warm welcome．他告诉我，说我准会受到热情接待的。
然而be sure to do用在祈使句中，不是表示判断，而是表示对对方的要求，意为“务必要”，“一定要”。例如：
Be sure not to forget it！千万别忘记呀！
Be sure to send my regards to your mother．务必代我问候你母亲。 Be sure not to do that again．一定不要再干那种事了。
3．be sure+宾语从句，表示主句主语对宾语从句中涉及的事物所作出的判断，意为“确信某事一定会……”。例如：
I'm not sure whether I've met him before．我不能确定以前是否见到过他。
We are sure he will make great progress this term．我们确信他这学期一定会取得巨大进步
make sure用法
make sure表示“弄确实；核实；查证”。make sure常用于祈使句，后面常接that宾语从句或of介词短语。Make sure + that从句意为“弄明白；确信”。Make sure + of + 代词/名词，意思也是“弄明白；确信”。例如：
— Make sure of his coming before you set off.
— I make sure (that) he would come.
— 出发之前要确定他是否来。
— 我确信他会来
be sure的用法
对be sure的用法常感困惑不解，现将其主要用法归纳如下。
1．be sure＋of／about+动名词或名词，意为“确信……”；“对……有把握”。但在接名词时，be sure of侧重指主语对某抽象事物的确信无疑；而be sure about则侧重指主语对某具体事物的确信无疑。例如：
He is sure of success．他自信会成功的。 I'm sure of his honesty．我肯定他是诚实的。
However，he went on to explain that he was not sure about two things—the grammar and some of the idioms．不过，他接着就解释说，他在语法和某些习惯用语方面都没多大把握。
If you are not sure about the situation in the world，you can read the newspaper every day．如果你对世界形势不大了解，你可以每天看看报纸。
若后面要接反身代词，则只能用be sure of，即be sure of oneself，意为“有自信心”。例如：
Joan will sit for an important examination next week，but she is not sure of herself．琼下周要参加一个重要考试，但她对自己没有十分把握。
2．be sure+不定式，表示说话人对句子主语作出的判断，认为句子主语“必定”、“必然会”、“准会”如何如何。例如：
It is sure to rain．天一定会下雨。
He is sure to have known about that．他准会知道那件事。
He told me I was sure to get a warm welcome．他告诉我，说我准会受到热情接待的。
然而be sure to do用在祈使句中，不是表示判断，而是表示对对方的要求，意为“务必要”，“一定要”。例如：
Be sure not to forget it！千万别忘记呀！
Be sure to send my regards to your mother．务必代我问候你母亲。 Be sure not to do that again．一定不要再干那种事了。
3．be sure+宾语从句，表示主句主语对宾语从句中涉及的事物所作出的判断，意为“确信某事一定会……”。例如：
I'm not sure whether I've met him before．我不能确定以前是否见到过他。
We are sure he will make great progress this term．我们确信他这学期一定会取得巨大进步
make sure用法
make sure表示“弄确实；核实；查证”。make sure常用于祈使句，后面常接that宾语从句或of介词短语。Make sure + that从句意为“弄明白；确信”。Make sure + of + 代词/名词，意思也是“弄明白；确信”。例如：
— Make sure of his coming before you set off.
— I make sure (that) he would come.
— 出发之前要确定他是否来。
— 我确信他会来。
be sure 和make sure 的区别：
Ⅰ. 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：
① I am sure that he is honest. 我相信他是诚实的。
② I have made sure that he is honest. 我已了解清楚他是诚实的。
Ⅱ. 二者后面均可接of 或about 引出的短语。如：
① I am sure of success
=I am sure that I will succeed. 我深信会成功。
② 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？
Ⅲ. 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：
① Make sure that you come here before five. 你一定要在5点前来。
② I am sure that he will come. 我相信他一定会来的。
Ⅳ. 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：
① Make sure to come to party on time. 一定要准时来参加晚会。
② He is sure to call you up. 他准会给你打电话的。
▲make sure意为“确保”“弄清楚”，后接介词短语、不定式或从句。如：
（1）have you made sure of the time of the train?
火车开车的时间你搞清楚了吗？
(2)he arrived at the cinema early to make sure of a seat.
为保证搞到座位，他一大早就到了电影院。
(3)i only come to make sure that everything was all right.
我只是来弄清楚是否一切都没有问题。
(4)we made sure you were not coming today.
我们确信你今天不来了。
【注】请注意make sure, be sure, for sure的区别：be sure后接不定式时，意为“一定”“必定”“准会”，若跟of或about或从句，作“肯定”“有把握”解释；to be sure作插入语时，意为“的确”“诚然”。如：
（5）be sure to write and tell me all the news.
一定要写信告诉我所有的消息。
(6)she is sure to find out the truth tonight.
她今晚一定会把真相搞清楚。
(7)she is not pretty, to be sure, but she is very clever.
她的确不漂亮，但是她很聪明。
(8)i’m not quite sure of his telephone number.
我不大清楚他的电话号码。
▲for sure 意为“肯定地”“毫无疑问地”。如：
(9)i don’t know it for sure.
这事我不敢肯定。
(10)i don’t know for sure that he was dead.
我确实不知道他已经去世了。
make sure 确保,确定
Make sure that you have finished all the work.
确保你完成了所有工作.
be sure 肯定,一定
He is sure to come here tonight.
他今晚一定会来这里.