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问题 on which + 不定式 理解

...nalists think the same thing is true of knowledge-if you have a solid base for your knowledge claims, then your knowledge structure is more likely to be strong... valid... true.请问老师，这里的on which 是否多余？或者 不定式应该改为一个完整的句子。我见得句子不多...

问题 had, have had, had had 的区别

By 31 January, 191 adults had been treated for the virus and either discharged or died at the two hospitals. The average age of these individuals was 56, and 62 per cent were men. Around half of those treated had underlying medical conditions, most commonly diabetes and high blood pressure.这...

问题 当ed形式的词是动词的过去分词时还有完成的含义么

Determined to finish the job,  he asked for help from many friends.Published by Your company,  the game was launched yesterday.请问老师， ed分词做状语，是不是只有再形容词的时候猜表示 被动+完成两种含义。如果只是分词的情况是不是只表示被动...

问题 see是静态还是动态

...例如know在完成时可以和时间段连用，例如I've known it for 2 years.但I've seen it for 2 years.却是不对的。I've seen her this morning.这里我认为see就是动态动词。麻烦老师讲解一下

问题 过去分词和现在分词可以同时出现么

Treatments for animals developed using animal testing include pacemakers for heart disease and hip dysplasia.   animals后面为什么既有过去分词又有现在分词？过去分词和现在分词可以同时出现修饰一个单词吗?还有别的例子吗

问题 noun are fewer than的用法

请问下 jobs for women are fewer than jobs(those) for men 是对还是错的 原因是什么? 这个问题的重点是 我不确定 noun + are fewer than这个形式是否合理

问题 几个经济学人文章的问题（请曹老师解答)

...地方：1. Announced three years ago to much fanfare about being a transformative moment for the health-care industry, Amazon,JPMorgan Chase and Berkshire Hathaway quietly shelved Haven, a joint venture they set up to lower staff health-care costs. 这里很明显announced部分的主语不是Amazo...

问题 classifiers的来源问题

(1) The most common lexical source for classifiers are nouns; verbs are used less frequently.(2) All classifiers of a given type in a language may have one kind of source (either nouns or verbs); classifier systems of mixed origins — some from nouns, and some from verbs.上面两段话，介绍的...

问题 being+done现在分词作后置定语

Several parents spoke of requests for work being ignored or refused by the school.这句话being+done是现在分词作后置定语，但我记得以前学的语法是用过去分词来做这种被动情况下的后置定语，因此我觉得being直接可以删了是不是？后面直接跟ignored....

问题 to be damaging to health

It is important for the government to tighten regulation on some behaviour,especially those which have been proven to be damaging to health.句中为什么用to be damaging to health这种形式?damaging是形容词吗？

问题 when nothing...状语从句的省略

...eryton was necessary to amuse their morning hours and furnish conversation for the evening.每逢没有更好的事情可做，就必定往梅里顿跑一趟，这样早晨可以消遣消遣，也为傍晚的闲聊搜刮一点谈资。better offered为过去分词作后置定语，我想问老师这...

问题 in search of...是表目的吗

He was saved by Dorothy in a great field, and joined Dorothy to go to the Wizard in search of brains.这句中加粗的地方为什么用介词 in，一般表目的不都是用 for 的吗？麻烦高手给指点一下，不胜感激。

问题 逗号后面的mindful of是什么结构

For the better part of a century, most biologists have been reluctant to use those words, mindful of a principle of evolution that says ‘evolution cannot run backwards’.mindful of...是什么结构？书上说这是独立主格结构，我不太明白......

问题 seed是名词还是动词

...seed是名词还是动词？上下文： China has gained recognition for its pioneer work on true potato seed. The history of true potato seed (TPS) in China dates back to 1959 when research was started. Now in china an area of 2500 acres is sown to seed.

问题 动词名词化过程的解惑(非V-ing名词)

...问题，求尽量详细。,谢谢！引例：请问这个句子这样对inform进行名词化，然后造句是对的吗？There is a information of enemy's withdrawal from a spy in our troops下面是我在词典和一些考研资料上看到的几种句子：1. There was a indirect criticism of t...