...成式主要表示发生在谓语动作之前的动作。如：Having been thereonce，she
knew the place quite well. 由于去过那儿一次，她对那地方很熟悉。Having failed twice, he
didn’t want to try again. 他已经失败了两次，不想再试了。二、现在分词完成式与...
...Shapiro suggested that the panel had found a broad consensus that it would be “morally unacceptable to attempt to create a human child by adult nuclear cloning.”请问：(1) 如何理解第一个 to？(2) suggested 在这里是“建议”的意思吗？为什么后面不用“should+动词原...
...p;Have you got to go to the dentist's today. I happened to be out when he called.请教老师：上面3个例句不都出现了不定式to吗？是不是书本印刷错误了？ 按理，这种学生用书不会错呀？ 不能理解。 请教老师怎么回事呢？ 谢谢！
...p to 24 hours advanced warning.2. Valve must be installed downstream of receiver tank.请问这两句中downstream of ... 中的downstream是什么词性呢？形容词？副词？还是名词？我知道形容词后是可以接介词短语的...
All this has happened, in part at least, because the fathers who were plumbers made enough money to send their children to college so they wouldn’t have to be plumbers.书上的参考翻译：做水管工的父辈赚了足够的钱，把孩子送进了大学，于是孩子们便不用再当水管...
...stion might even arise in the parents minds as to whether the child should be compelled to go to school at all.老师，这里的as great as it is怎么理解，为什么as great as 能提前，it指代的又是什么，后面那个as to是关于的意思么，as to引导的部分是question的同...
...e contents of all the letters. Miss
Winthrop and I were the only two human beings who knew what was in them all.各位老师，同样都是content，为什么第二句用复数形式。这里有什么不同的表达的意思吗？
His arguments radically revised existing concepts of electromagnetism（电磁），light，and the behavior of moving bodies as set forth in Newtonian physics.如果as set forth in Newtonian physics 是非限制性定语从句，为什么之前没有逗号？如果是限制性定语从句，为什...
...rdsworth's profound love for nature and his conviction that no earthly beauty can come up with the heavenly beauty that we find in natural objects and persons live in the midst of the natural surroundings.2. Dorian's story plays upon the timeless theme of selling one's soul in exchange f...
..., casein proteins, and soy proteins can be manpulated to form products like yogurt, cottage cheese, gelatin desses, and tofu. 不定式to form做whey protein 等的主语补足语还是...
That smartphone sales have peaked, and seem to be levelling off at around 1.4bn units a year, is good news for humanity. 这里的 a year是做定语修饰around 1.4bn units吗？感觉不是修饰谓语动词 level off 的。
...是否也有推测及表示“必须”的意思？比如“You gotta to be kidding me.你肯定是在和我开玩笑”而不翻译为“你不得不给我开玩笑”问题2：gotta除了等于“have got to”，它和got to是什么关系？它也等于“got to”吗?比如：I gotta go=I have ...