...有时亦可用mustn't.1. You must have misheard, haven't you ?2. It must have rained last night, didn't it ?为什么第一句是haven't, 而第二句是didn't ? 为什么第二句不是haven't it ?二句是否都可以用mustn't you/it ?
It isn't too difficult once you get the idea. 你一旦弄懂了，就不太难了。It's easy, once you've got the knack. 你一旦掌握这个技能就容易了。Once you're stuck in deep snow, it's difficult to lever yourself out. 你一旦陷进深雪中, 那就很难出来。Remember, once you...
...具有特定语义时才跟无to不定式（Know takes a bare
infinitival only in the perfect and with a special sense）例如：I'd never known him (to) lose his temper before.但I know him to
be thoroughly reliable一句中，to不能省略。CGEL所称know的“特定语义”指的是“亲身...
...course, I know how to sail. Why wouldn't(就在这里) I know how to
sail. It's just….It's been a while.这里的wouldn't是属于过去将来时吗？还是虚拟语气？还是委婉礼貌假设(语气)？或者推测？对于这四者我一直思维混乱，特别是委婉礼貌假设(语气)...
It is his wife that makes
the decisions in his family.It is his wife that made
the decisions in his family. It was his wife that makes
the decisions in his family. It was his wife that made
the decisions in his family. 请问这四个强调句的时态都对吗？为什么？有什么可靠的依据...
...见有网友提问下面的问题：In World War Ⅱ, Japan hoped ________ its power to the whole Asia, and it did not succeed.A. extend B. extending C. to extend D. to have extended答案一般都是给D，考查hoped to have done，表示“本想做某事（但没做成）”。但这个题...
Luckin Coffee, a Chinese startup that’s banking on selling cappuccinos to on-the-go office workers, is spending millions of dollars a year opening outlets to unseat Starbucks Corp. as the top java seller in the country. 这里的a year是定语修饰millions of dollars？这里是不是spend ...
Brown bears are omnivorous, eating anything that they can get their paws on. 棕熊是杂食性动物，抓到什么吃什么。有人说这句中的现在分词短语 eating anything that they can get their paws on 是非限制性定语，这种说法对吗？这个现在分词短语是非限...
1. In the last act, a gaoler would always come on to the stage with a letter which he would hand to the prisoner.2.The curtain went up on the final act of the play and revealed the aristocrat sitting alone behind bars in his dark cell.
...ide China, Norway has helped supercharge demand for electric vehicles, but it could afford to finance the tax breaks and other incentives because of the immense wealth it derives from oil and gas. （译：挪威和中国一样，大大增加了对电动汽车的需求，但由于石油和天...
The
repairs cost a lot, but it's well ( )A.
to spendB.
spentC.
being spentD.
spending答案是B.
spent.这里是否应该说成 but it was well spent, 用is有误吗？前面的谓语cost这里应该是过去时，不可能是一般现在时吧? 如果是的话，那么后面就应该说成 but it...
...eat painter, but you must confess the chances are a million to one against it. It'll be an awful sell if at the end you have to acknowledge you've made a hash of it.""I've got to paint," he repeated."Supposing you're never anything more than third-rate, do you think it will have been worth while to ...