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问题 if ever she 或 if she ever 是一样的吗?

此结构中ever位置有讲究吗? if ever she 或 if she ever都可以吗?意思一样吗? She had told him to come straight in (if ever she / if she ever ) failed to open the door.

问题 be useful加各种介词的意思

be useful to sth/sb；词典：对…有益be useful to do是什么意思，有这样的用法吗？be useful for词典：对…有用; 具有…用途 be useful in doing是对做什么方面的事有帮助有用，还有是  be  useful in sth什么意思？

问题 than后为什么接动词不定式

曹老师，想请教一下，know better than to do sth是一个固定表达，意思是“还不至于(无知到)去做某事”，其中than是连词或介词，为什么这里的than后可以接不定式to do呢？

文章 no matter 能否直接后跟名词（没有wh-词）

...n’t open what they absolutely know is a door. What if later in life they come to a metaphorical door, like an opportunity of some sort, and instead of opening the door and taking the opportunity, they just stare at it and wonder, “What if it isn’t a door?” That is, “What if it isn’t a re...

问题 悬空不定式与不定式被动式的区别

...动都可以，想请教一下曹老师个问题：I have a lot of work to do.I have a lot of work to be done.第一句应该是悬空不定式，那是否可以理解为：悬空不定式与被动的区别不仅是逻辑主语不同，一个为主动，一个为被动，还可以从句子所要强...

问题 “否定转移”是必须的吗？

... that he is clever. 我认为他不聪明。I don’t believe that he will come. 我想信他不会来。请问这种否定转移是必须的吗？即必须要进行否定转移吗？或者说，不进行否定转移算错吗？比如下面的句子对吗？I think that he isn’t clever. 我认为...

问题 natural progressive 是什么意思

Think this through very carefully before you write so that what you say shows a natural progressive from past experience to the job you are applying for.这句话的natural progressive要怎么理解？

问题 请分析这个句子的结构，包括句中what的用法

Therefore, when a person from one of these cultures is speaking and suddenly stops, what maybe implied is that the person wants the listener to consider what has been said before continuing.请分析这个句子的结构，包括句中what的用法。谢谢！

问题 as引导的比较从句与方式状语从句的区别

...复，结合自己的一些思考，有以下不解之处1.比如We will do works as planned.= We will do works as is planned.= We will do works as it is planned that we should do.由此可见it形式主语和真正主语是同时省略的，但是上述句子gap的形成好像并不是由比较对...

问题 怎样判断形容词和动词后面的附加状语是用to还是for来引导

比如：1.是The book is useful to you.还是The book is useful for you?2.是read a story to her还是read a story for her?针对1，学生之前似乎看过这样的解释：“for是一种主观判断，to是一种客观事实”，这种说法是否合理？另外，我知道这类搭配多积...

问题 如何理解情态动词后接动词的不同时态形式

情态动词后接的是动词原型还是不带to的不定式。如果是动词原型，怎么理解一下几种形式：would do, would be doing, would have done, would have been doing.？动词原型还有进行、完成和完成进行的变化形式吗？

问题 关于out的词性问题

...有必要分析词性，作为一个复合介词整体看待？set out to do sth.中out是副词吗？to do sth.作状语修饰set？

问题 But it is not just the things that you can add to your resume that matter. 请问该句如何翻译，该句结构是不是强调句型？若是，则去掉强调句型结构it is that后，简化成主谓结构其实就是the things matter对吗？

另外，延伸一下，歌曲《It  is the glitter things that count》是不是也是强调句型结构呢？如何直译，又如何雅译呢？

问题 to的分类

牛津初阶第四版和柯林斯大词典把to do的to都归类为介词。请问这样对吗？

问题 宾语和宾补的关系问题

...相当于主语和表语之间的关系……”我的疑问：不定式to do(不是to be)为宾补时，宾语和宾补之间相当于主语表语关系吗？比如He let me go home.宾语和宾补之间相当于主语表语关系吗？能将宾语和宾补之间的关系用主系表结构表示出...