2017年PETS3口语练习手册口语中如何表达肯定与不肯定Certainty Expressions 表达肯定基本表达法我十分确信。I m quite certain it is.I m absolutely sure it is. 我绝对相信。Yes， it certainly is. 是，它肯定是。I don t see any problem. 我看不出有什么问题。I m a hundred percent sure. 我百分之百相信。I m absolutely positive. 我绝对肯定。You may be certain that the situation is in our favour.你能确定情况在我们的掌握之中。非正式表达法Absolutely positive. 绝对肯定。Bet I will get it. 打赌我一定会赢。I bet. 我肯定。No doubt it is. 毫无疑问。That s for sure. 那是肯定的。Yes， really! 是的，真的。正式表达法You can be sure. 确信无疑。I don t think I have any doubt about that. 我对此没有任何疑问。I must say his honesty is beyond doubt. 我必须说他的诚实不容怀疑。I am quite convince.我十分相信。It s definite he ll win. 他是必赢的。There is no doubt about it.Uncertainty Expressions基本表达法I m not sure if it is.I m not at all sure if it is.I m not certain if it is.I can t say for certain.I m not too sure of it.勿庸质疑。表达不肯定我拿不准。我根本拿不准。我拿不准。我说不准。我不十分拿得准。I should think I heard some noise from above. 我好像听到有人在上面出声。I suppose it could be two o clock at midnight. 我猜那是在夜里2:00 。I think it was an American detective story or something like that. 我想是一部美国侦探小说或类似 （ 的书籍） 。非正式表达法Hard to tell.It could be the name of a magazine.难说，可能是一本杂志名。Could be. 或许是。Might be. 可能是。I couldn t say. 我说不准。考试用书I can t be sure. 我说不准。I can t decide. 我说不准。I really can t tell. 我真的说不准。Hard to tell. 很难说。正式表达法I find it difficult to draw a conclusion on that. 很难就此下结论。I have a feeling that we ve taken a wrong way, but I maynot be corret. 我感觉我们方法不对，但也许我弄错了。I m not at all convinced. 我不完全确定。There s some doubt in my mind. 我心有怀疑。