baibaicause
▲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。
Rainniebaby
be sure to do一般指别人认为主语可以做某事be sure of doing一般指主语自己认为可以做到某事You're sure to win the competition.I'm sure of passing the exam.
吃喝玩乐nnn
be certain to do 和be sure to do的区别
一、祈使句中用法不同
1、Be sure (not) to do sth.意思是一定要或不要做某事，祈使句通常采用be sure to do。 如：
Be sure not to forget it.
千万别忘记啦。
Be sure to get there before nine.
务必在九点前到达。
2、祈使句中通常不用 certain。
二、在句中用了形式主语或形式宾语 it 时用法不同
1、在句中用了形式主语或形式宾语 it 时，通常只用certain。如：
It's certain that he'll come tomorrow.
他明天肯定会来。
I thought it certain to be late.
我肯定会迟到。
2、在句中用了形式主语或形式宾语 it 时不用sure。
扩展资料：
be certain to do 和be sure to do表示“一定”或“确信”，有时可互换。通常后接不定式。如：
He's certain [sure] to win. 他一定会成功。
They're certain [sure] to need help. 他们肯定需要帮助。
If you do this, you are certain [sure] to be found out. 如果你这样做一定会被发现。
小猴子@219
Ⅰ. be sure 指某人对某事或对某种情况有把握，常译为：“确信”；\x0d\x0amake sure 指“务必、务请、确保”将某事弄清楚。如：\x0d\x0a① I am sure that he is honest. 我相信他是诚实的。\x0d\x0a② I have made sure that he is honest. 我已了解清楚他是诚实的。\x0d\x0aⅡ. 二者后面均可接of 或about 引出的短语。如：\x0d\x0a① I am sure of success\x0d\x0a= I am sure that I will succeed. 我深信会成功。\x0d\x0a② Will you make sure of his return?\x0d\x0a= Will you make sure that he returned? 请你查明他是否真的回来了。好吗？\x0d\x0aⅢ. make sure 后面的that 从句一般不用或很少用将来时；\x0d\x0abe sure 后面的that从句则可用将来时。如：\x0d\x0a① Make sure that you come here before five. 你一定要在5点前来。\x0d\x0a② I am sure that he will come. 我相信他一定会来的。\x0d\x0aⅣ. 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；\x0d\x0a而be sure 则不受限制。如：\x0d\x0a① Make sure to come to party on time. 一定要准时来参加晚会。\x0d\x0a② He is sure to call you up. 他准会给你打电话的。
