我对这不确定。
'I'm not sure about it,' he said weakly.
“这我说不准。”他支吾说。
你对这有把握吗？ ？
对于这件事我确实有把握。
我真的不敢确定的。
What could you say for sure about it?
你们有什么可以确定的吗？
我不肯定。
B: Sorry, I'm not really sure about it.
对不起，我不能肯定。
你对此确信吗？
I think you are not quite sure about it.
我认为，你们对这一点并不能完全肯定。
I'm not sure about it. I hope the company will.
我不太清楚。希望公司会给出钱。
I'm not sure about it. I have to check my schedule.
我不肯定。我得检查一下我的日程安排。
Do you feel sure about it? Do you feel sure about it?
你能对这有把握吗？你能对这有把握吗？
I think the answer is right, but I'm not sure about it.
我想这答案是对的，但是我没有把握。
I think the answer is right but I'm not so sure about it.
我想这答案是对的，但我没有把握。
I am not sure about it. Can I inform you later this week?
这件事我不确定，我可以本周晚一点通知你吗？
I think that it was years ago, but I'm not sure about it.
我想那是两年前的事，不过我不能肯定。
I might go to the concert tonight, but I am not sure about it.
我可能今晚要去看音乐会，但还不确定。(表示对现在不太肯定的推测)。
I think the answer is right, but I'm not absolutely sure about it.
我认为这答案是对的但我没有绝对的把握。
In fact, I heard something about you at school, but I am not very sure about it.
事实上，我今天在学校听到了一点有关你的事情，但是我并不是很清楚。
I'm always careful. It's not my style to jump to any conclusion before I'm really sure about it.
鄙人做事向来谨慎，不肯定的事一般不会下结论。
I am sure you can guess what it is about.
我相信你能猜到它是关于什么的。
Grandmother, I shall tell grandfather about it, and I am sure he can make it light for you.
奶奶，我要把这件事告诉爷爷，我相信他肯定会让您重新看见的。
Be sure to add to it whenever you hear about a good book.
当你听到一本好书时，一定要把它加进去。
She said she knew nothing about the robbery, but I'm sure she's in it up to her neck.
她说她对这起抢劫案一无所知，不过我敢肯定她深深卷入其中。
To be sure, I have no illusions about it.
当然，这并非是我的错觉。
To be sure, I have no illusions about it.
当然，这并非是我的错觉。
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