He has to move about in a wheel-chair since five years old.
按语法规定，这个句子不太对，因为 since 前面的句子应该用现在完成时，但这个句子的谓语是 has to，它如何变为现在完成呢？难道是用 has had to? 像下面这样用？
He has had to move ...
...的感觉很别扭，请老师给予指点斧正。First, other drugs, glutarimides—themselves potent protein-synthesisinhibitors—either failed to cause amnesiain some situations where it could easily be induced by puromycin or produced an amnesia with a different time course from that of puro...
Fearing that their countries might someday be lost to rising seas, they asked the intergovernmental panel for further study of a lower threshold.这些岛国害怕自身有朝一日会因海平面上升而被淹没，因此请求联合国气候变化政府间专门委员会进一步研究出全球...
专八改错原题：A market in instruction quickly emerged. Collections filled with jokes, quotes and fun facts proliferated, promised to teach, as John Cotgraves Wits Interpreter put it, "the art of drinking, by a most learned method". 题目提示promised 所在的一行有误，我在promised ...
Cells grow and develop，reproduce and interact with the environment。
这句话中with the environment 是跟interact搭配，那and前是个动词reproduce，后面是动宾，这样的and前后是并列成分吗？
The people who hire and director the work of other employees are managers。这...
...四级阅读中关于高等教育作业收费系统的文章：She didn't hand in her first two assignments for chemistry, which started her out in the class with a failing grade.字典中start out意思是开始，出发等等。但是没有start sb out的用法。单看start，韦氏高阶字典...
你好，我看到您说的can在表示理论性推测时，后面不能接不定式完成体和进行体，那么我看到一个句子：Sitting in front of a
screen for too long can be damaging to both the eyes and the physical posture
of a young child.这个句子不是can表示理论性推测吗...
at one go 和 in one go 都是正确的用法 在某学生的一次书面表达中，有这样一个句子：I cleaned ten desks at one go yesterday. 老师把 at 改为 in。 实际上，学生的句子也是正确的，即at one go 和in one go 是同义短语。在人民教育出版社新目标...
More people hope to live in the countryside than _______.A. used to B. they used to请问答案是是选 A 还是 B？或是两者都可以？换句话说，在这类句子中，是用 than used to 还是用 than they used to？或是两者都可以？
Gandhi's Indian empowerment argument, critics said in a petition to remove the statue, appeared to be that the British colonial government treated Indians a "little better, if at all, than the savages or the Natives of Africa."有两个问题一个是作为主句的谓语动词appeared...
Prices vary widely from shop to shop. 商店之间的价格相差很大。
这个句子中的vary from shop to shop为什么没有冠词? 可以这样改一下吗？
vary from a shop to a shop
vary from shops to shops
vary from the shop to the shop
1. She broke into the conversationat a crucial moment.她在关键时刻打断了谈话。the conversation 作短语动词 broke into 中介词 into 的宾语。作时间状语的 at a crucial moment中，moment 也叫介词 at 的宾语？2. 动词短语还短语动词有什么区别？
A string of accidents, including the partial collapse of a cooling tower in 2007 and the discovery of an underground pipe system leakage, raised serious questions about both Vermont Yankee's safety and Entergy's management especially after the company made misleading statements about the pip...