jettyjiang
I'm not sure whether I should tell you this.
我拿不准该不该把这事告诉你。
I'm not sure that this is the most valuable use of my time.
我不能肯定我的时间这样来安排最有价值。
I think this is their house, but I'm not sure.
我想这是他们家，但不敢肯定。
One should never criticize if one is not sure of one's facts.
一个人如果对自己掌握的事实没有把握，就绝不该随便批评。
Ask me if you're not sure how to do it.
你要是拿不准怎么干，就问我。
我最亲爱的12345
英语是：I'm not sure if I can do it well.句子解释：sure 英[ʃʊə(r)] 美[ʃʊr] adj. 确信的，确实的; 有把握的; 无疑的; 一定的; adv. 当然; 确实地; 无疑地; [例句]He'd never been in a class before and he was not even sure that he should have been teaching他以前从未教过课，甚至不确定自己该不该教课。if 英[ɪf] 美[ɪf] conj. 即使; 如果，倘若; 〈口〉是否; 假设; n. 条件，设想; [例句]She gets very upset if I exclude her from anything要是有什么事情我不让她参加，她会非常难过。well 英[wel] 美[wɛl] adv. 好; 很; 好意地; 高高兴兴地; adj. 良好的; 井的; 健康的; 恰当的; int. （用于表示惊讶，疑虑，接受等） ; [例句]Sylvia shook hands. 'Well, you go get yourselves some breakfast.'西尔维娅摆了摆手说：“嗯，你们自己去吃些早餐吧。”
