基本表达法
I’m not sure if it is.我拿不准。
I’m not at all sure if it is.我根本拿不准。
I’m not certain if it is.我拿不准。
I can’t say for certain.我说不准。
I’m not too sure of it.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 may not 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。
