'cannot'(缩写为'can't')表示当前或未来某种事情不可能发生,强调现在和将来的事实和状态;而'couldnot'(缩写为'couldn't')表示过去某种情况不能发生或某种行动无法完成,强调过去的事实和状态,且语气更委婉、更礼貌。 'Cannot'和'Could not'的基本定义与用法 'Cannot'和'Could...
在否定句中,用cannot/could not (不可能),may/might not (可能不)表示 推测。 (1)表不对现在或将来的否定推测,用“ cannot/could not/may not/might not+ 动词原形”结构。 Though he is busy, he can’t refuse your invitation because you are good friends. ...
cannot 是主观上不能做，比如 I cannot shoot him .是我不能向他射击的意思，而 I could not shoot him，则是我射不到他，我不能够射到他，这样明白点么，could not 是指客观上做不到某事，你可以简单的理解为汉语的 我不做 和 我做不到 。我们常听到的 I cannot do it 是说我不能这样...
Score: 4.5/5(57 votes) they are different because cannot means you're saying that you're not gonna able to go swimming (later), But could not means you're saying that you didn't get a chance to go swimming (earlier).Cannot is present tense. Could not is past tense. Could not Cann...
词汇 you cannot/could not but… 释义 Idiom What could he do but forgive her? (= that was the only thing possible) 他不原谅她又能怎么办? 随便看 Trade-topic invoice Trade-topic invoice Trade-topic invoice Trade-topic invoice Trade-topic layaway Trade-topic layaway Trade-topic leasing Trade-...
cannot 是主观上不能做,比如 I cannot shoot him .是我不能向他射击的意思,而 I could not shoot him,则是我射不到他,我不能够射到他,这样明白点么,could not 是指客观上做不到某事,你可以简单的理解为汉语的 我不做 和 我做不到 .我们常听到的 I cannot do it 是说我不能这样做,是主观意识下的...
cannot=could not =must not may not=might not 你要注意一下could和can表可能性的时候有区别 couldnot和cannot就是完全一样的语气，非常肯定的 不可能 不可以
could 从语气上讲比can 更委婉 一般虚拟语气就是把时态向前推一个 比如 if的虚拟语气 if I were a bird,I could fly all over the world.此处就表示与现在的事实相反，我现在要是一只鸟的话，我会周游全世界。但事实并非如此，所以if 条件句就用一般过去式来表达，从句也用一般过去式来表达。
这是一个固定用法。cannot 的意思 跟 can not 是一样的，可是就是不能分开写，一定要连在一起写。或者写成 can't.could not 可以分开写，或者写成 couldn't
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