各位老师您们好:我们知道 The bird flies. 是“主+谓”结构,那么The bird is flying. 是“主+谓”结构还是“主+系+表”结构呢?还有:1. I have watched the movie. 谓语动词是have watched吗?2. He was knocked down by a bus. 应该把knocked down看成表语(...
One of Marie Curie's outstanding achievements was to have understood the need to accumulate intense radioactive sources, not only to treat illness but also to maintain an abundant supply for research. 居里夫人的一项杰出成就是理解了积累强放射源的必要性,这不仅是为了治...
By the end of this month, we surely _____ a good solution to the problem. A. have found B. will been found C. will be found D. are finding 这题选择B,不明白为什么有个被动在里面,我们主动寻找,还有D选项,可以表将来吗?...
Never waste time wondering if you _______ a good future. Just work hard if you keep trying your best to study, you _______ make if.A. have, make B. will have, will make选 A 为什么不行?have a future 不行?现在就没有未来吗?
https://www.cpsenglish.com/question/46241 这个回答里说He had not been caught by the police until Dec. 2003.这样的句子不可以用过去完成时。https://www.cpsenglish.com/question/29879 这个答案里又查到现在完成时不可以和表示过去的时间状语连用。。除...