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问题 为什么once（曾经）连用一般现在时而不是一般过去时

All of the plants now farmed on a large scale were developed from plants that once grow wild.这个句中有once ,为什么grow用一般现在时而不用一般过去时？一般现在时表经常发生的动作或存在的状态，表日常行为、习惯、能力或客观存在。句中的一般...

问题 would have done 和 would like to have done 的区别

Much as ________, I couldn’t lend him the money because I simply didn’t have that much spare cash.A.I would have liked to B.I would like to haveC.I should have to like D.I should have liked to想请问一下，A和B什么区别呢？

问题 only then / on no account 可以放在句子的哪些位置?

Only then did I realize how dangerous the situation had been.On no account must you accept any money if he offers it.如以上例句,如果不倒装,only then 和 on no account,除了放在句末,还能放在其他位置吗?能否像这样随意调换位置? I only then realize... I realiz...

问题 one/that指代替换前面出现的名词的疑惑

1）We now know that Archimedes, one of the foremost mathematicians of ancient Greece, devised a method forcomputing volumes that was very similar to THAT of Newton, who developed calculus.语法书上说，one 指代带不定冠词的名词，而that指代带定冠词的名词，那么上面句子...

问题 alert sb to sth=sb be alerted to sth吗

They have been alerted to the possibility of further price rises.他们己意识到价格可能继续上涨。牛津字典上写的用法是alert sb to sth 使认识到，使意识到。我想问他为什么要加been。是因为alert sb to sth=sb be alerted to sth吗？希望老师可以解释一...

问题 “More than+含有can(could)的从句”的用法中，从句是比较状语从句吗

...常表示“否定意义”，从句的谓语必须是及物动词。如：The pain was almost more than he could bear. 这种痛苦几乎使他无法忍受。查了很多语法资料，基本上都只写More than后面可以接can(could)的从句，但对这个从句属于什么从句都避而不...

问题 for sb to do sth中的sb用宾语还是反身代词

He thought it difficult for him to go on with the experiment. 他认为继续实验对他来说很困难。 问题 1. for him 用了宾格能不能说明句子里的他不是一个人，若是一个人应该是 for himself 对吧。 问题 2. it 为形式宾语，不定式为宾语 diffic...

问题 a maximum of 7 days 与 7 days of moments的理解

老师请看例句：They will spend a maximum of 7 days to finish the job. 他们最多需要7天完成工作；7 days of moments are visible. 朋友圈7天可见；A maximum of  7 days.     关于这个短语 A maximum of 是作前置限定 还是 of 7 days作后置定语表示...

问题 not only...but also连接从句时的使用？

...lso"是内嵌到从句中，则需要倒装从句内的结构，如：The newemployee soon proved that not only was he capable but he could also be trusted. 即that引导的包含"not only...bualso"结构的从句？

问题 关于should的用法

...？3)这个should和用在suggest后的should是不是一样呢？比如：The teacher suggested that we should practice more after class.这里是不是加上should就是陈述语气了，不加就是虚拟语气。

问题 19-year-old Asian pop star Candy Wang前为何没有冠词

...ld Asian pop star Candy Wang. 谓语 interviewed 后怎么没有冠词a, the 呢？是因为 19-year-old Asian pop star 是 Candy Wang 的定语而 Candy Wang 才是中心词？若果 star 后有个逗号或者 called，则 interviewed 后应有冠词，是这样吗？盼望老师的指点。...

问题 如何判断短语动词中的小品词是介词还是副词

...还是代词作宾语，都要放在介词的后面。如：look at it / the picture。令我疑惑的是,一个短语如：pick up 与 look at 这样的，怎样判断 at 或 up 是介词还是副词呢？这个动词与是不是及物与不及物有关呢？谢谢!

问题 非限定动词问题

...D-19 vaccine boosters 8 months after second dose.3.Brisbane picked to host the 2032 Olympics.以上这些推文，为什么不用（时+态）来造句，而只用一个非限定动词形式来表达？相较于用时态来表达，这种表达有什么特点，或是应用于什么场景？一般...

问题 Monday, Tuesday, Wednesday 等作状语可位于句首

...y, Saturday, Sunday——用作状语时，前面通常有介词on。如：The accident occurred on Friday. 车祸是星期五发生的。Karen has a date with Paul on Monday. 星期一伦和保罗有个约会。He cannot spare any time except on Sunday. 除星期日外，他抽不出时间。▲这...

问题 must, will 表推测或可能性时的区别

... will，我的感觉对吗？He hasn’t come yet, he ______ have missed the last bus.A. must   B. will3. 若有可能，麻烦专家老师讲讲must, will这两个情态动词的用法区别。谢谢您！