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问题 was to have done是什么时态

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...

问题 to have been作表语还是宾语呢

AIDS is said to have been the biggest health challenge to both men and women in that area over the past few years.想问下各位老师，to have been 这里是做什么成分？我看答案解析为不定式作宾语。但网上也有人说是表语。另外，AIDS is said to是被动语态吗？...

问题 hire 和hiring

...ed gin and tonic. In front of you is the beach, reserved for hotel guests with motor boats for hire. Behind you is an 18-hole golf course, which was cleared from the native forest and is kept green by hundreds of water sprinklers. Around the hotel are familiar international restaurant chains and th...

问题 主句主语是不定式结构的逻辑宾语

...主语并能转换为先行it-结构。例如：That question is difficult to answer = to answer that question is difficult = It is difficult to answer that question.另一种情况是，不能以不定式结构作主句主语，因而不能用先行it-句型予以转换。例如：The coffee is bit...

问题 to与for有什么区别？

They believe that caring adults have been very important ___________ a young person was born.答案是for.    to 可以吗？to与for有什么区别呢？“对于我”，是to me还是for me？ 

问题 as, to用法不清

The object of prime importance to the physically helpless infant is a human being. Babies seem to have a natural tendency to the human face as potentially rewarding.请教老师，这句话的as potentially rewarding是什么成分，而且as做啥词性呢，怎么连起来的，百思不得其解...

问题 定语从句中的 send sb sth 必须加上to吗

...不妥，应该改为：Mr Smith is the person who I sent my application to.Mr Smith is the person to whom I sent my application.如果你用的是 send sth to sb 来理解上面的句子，当然要加上 to；但如果是用 send sb sth 来理解呢？这个 to 是可以不用的吧？

问题 adj+to sb与adj+of sb解析

例1：He is mean to his wife.分析：to“对于，对（某个对象）”的含义，to his wife指“对他的妻子”，介词短语作对象状语修饰形容词mean，共同构成形容词短语作整句表语。例2：It was kind of you to help me. 分析：of you介词短语作状语修...

问题 come to的用法

I think that in far too many families not only do children come to take their parents' generosity for granted，but also the effects of this can actually be somewhat harmful to children.  句中come to 的意思是不是逐渐的做什么，然后他还有第二种意思是来做什么.

问题 appear to be adj. 的用法

我们知道apper to be adj这里是系动词用法，appear to do 这里是半助动词用法。我就想问下有没有appear to be done这个用法？如果有这里的appear 是什么词性。谢谢老师!

问题 be subject to 的理解

比如 The article is subject to duty. 1 不太理解，be subject to在这里是什么意思? 字典查出来的意思好像都不能翻译这句话。。。 "受支配，从属于；常遭受…；有…倾向的" 2 另外想问一下，原句是不是也可以用be subejcted t...

问题 曹老师解答存在句的非限定形式，自己还有三处不懂的地方

...特此再向你请教。第一个疑问:我觉得“there是形式宾语，to be后面的名词是真正宾语。  there to be只能做复合宾语。to be是宾补。宾补位置上的不定式是没有完成体的。"后面应该加上there是形式宾语，to be后面名词是真正主...

问题 分析：What does it mean to be good at English?

What does it mean to be good at English?看到这个句子无法第一时间顺畅理解，只是看到mean to do这个很常见的词组，但意思不对。想着把问句还原成陈述句看看能不能理解，只有把what放在means和to之间才合适，变成It means sth to be good at Engli...

问题 关于to不定式作定语分析

a. a letter to be writtenb. a letter to write请问老师ab两个表达有区别吗？一个是逻辑上的主动关系，一个是被动关系。这里两句都是to不定式作定语吗？但第二句子存在被动关系可以分析为主语补足语吗？

问题 know 还是 get to know

The most difficult thing in your life is to know yourself. 老师们好，我感觉这个句子的不定式应该要表达事件意义，而不是静态意义，所以我觉得，这里用to get to know yourself 会比较好一点，不知道老师们怎么看？