am not sure

1. I have been away from my hometown since three years ago.2. I could play the piano when i was seven.3. We are sure that he canwork out the problem.4.It is the first time that I have met him.5..I want to know when he will go to America.6.He has caught a...

你好。你打错了。应该是：I am sure if- - - - - .不过，你的句型有问题。1 I am sure+that +句子---用于肯定句：(只有肯定句是that的结构)I am sure that he will come today.2 I am not sure +疑问代词/疑问副词开头的句子：I am not sure if / whether / when / how he wil...

二、语气程度不同 sure的语气最轻，其次为certainly，语气最重的为of course。1、A:Could you please give me a hand? 可以给我搭把手吗？B:Sure. 好哒。2、A:Could you please give me a hand? 可以给我搭把手吗？B:Of course! 当然可以啦！3、A:So,that book is not yours? 所以那本...

但是，并不能据此认为只能如此。因为，实际上，它后面按照实际需要，在前面为肯定情况时，后面完全可以接适合语义表达需要的wh-词。例如这个对话：——I am not sure when he will come.——I am sure of/about when he will come.2、详细情况，你可以参考以下网址：http://baike.baidu.com/view...

117 I am not sure such data does exist.我不确定是否有这样的资料存在。118 It would depend on what is on the list.这要看列表内容。119 We need them urgently.我们急需这些资料。120 All right. I will send the information on a piecemeal basis as we acquire it.好。我们收齐之后会...

help to us.我们相信这本书对我们会有很大帮助。 4. 两者都能用于make sure/certain +从句”结构中，表示确定；弄清楚”，主语只能是人。如 you must make sure/certain when the bus will leave. 你必须弄清汽车何时出发。 5. i ' m not sure…”与i ' m not certain…”意思相同。

“sure”通常与动词搭配，表示对动作的肯定或确认。例如：I am sure of/about my decision. (我肯定我的决定。)“certain”则通常与名词或代词搭配，表示对事物或人的确定性。例句：I am certain of/about the fact that he will come. (我肯定他会来这个事实。)四、 语气上的差异 “sure”在...

adv. 当然；确实地；无疑地；不用客气 读音：英 [ʃʊə(r)] 美 [ʃʊr]词源解说：sure于1300年左右进入英语，直接源自古法语的sur, seur，意为安全的，保险的；最初源自古典拉丁语的securus，意为平静的，不留心的。双语例句：I think you are not quite sure ...

be sure of 与 be sure about 的区别如下所示。1. 释义区别:- "Be sure of" 表示对某事或某人的确信或确定。例句：I am sure of his honesty.（我对他的诚实非常确信。）- "Be sure about" 表示对某事的确定或确信。例句：I am not sure about the time of the meeting.（我对会议的...

if或whether取决于后面，和前面无关。如果搭配or，就必须whether，其他都可以。比如I am not sure whether he will come or not.I am not sure if he is right.