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问题 to do还是to have done

... after doctors completed a 20-hour operation _______ one-year-old twins at the head.A. to separate B. to have separated  老师，您好。此题究竟选A还是选B，我一直困惑不解。有人说只可以选A，有人说必须是B。您的看法是什么呢？为什么？ 

问题 一般过去时与过去进行时区别一个例子

A fallen tree blocked the road. A fallen tree was blocking the road. 请问这两句分别用一般过去时和过去进行时都可以吗？两者的区别在哪里？

问题 Being 是否可省略

The news was quickly spread, being on the front page of The Times. 请教老师，我们知道状语中形容词前的being可以省略。此句介词on前的being 可否省略？其次，其他什么情况下，being也可省略？谢谢老师。

问题 chemicals plant还是chemical plant(作定语用单数还是复数的问题)

...句一: A small electronics manufacturing company makes a presentation to the board whether to outsource their distribution or build their own warehouse.例句二: Land was previously occupied by chemicals plant (now demolished).例句一的 electronics 用复数，就像 the American electronics in...

问题 the purpose作主语时表语只能用不定式吗

The main purpose of the course is to help improve each student’s reading ability.本句 2019版人教版高中英语新教材必修一的 Unit 1（p15）。老师说这里作表语的不定式只能用不定式 to help，不能用 helping，因为主语是 the purpose。这是不是说 the purpose...

问题 the same...that这边可以用the same...as吗

These objects are "failed" stars—which means they are not massive enough to jump start the same kind of reactions _____ power stars such as the sun. Instead, brown dwarfs simply shrink and cool down. A. whose         B. which         C. that            D. as答案为什...

问题 改错题问题(用动词原形还是现在分词)

They found how terrible the situation was. They could see the serious pollution. Look into the reason, they asked the government to pass the law to protect the environment and keep the balance of nature. Now everything has changed. Birds are singing.老师们好，请问这道改错题中的Look int...

问题 than necessary or possible是否=than it is necessary

曹老师提到（http://ask.yygrammar.com/q-26040.html），Use too many with countables to talk about more things than necessary or possible.中的than从句=than are necessary or possible（than为主语，对应但不等同于主句的things)He never says more than is necessary.无省略，than...

问题 ​独立主格可以和不定式搭配吗

独立主格可以和不定式搭配吗： South Korea has moved 2/3 of its government agencies away from Seoul, many of them to the newly built Sejong city.

问题 判断分词短语在句中成分

老师：The young man, tired of working for others, is determined to start his own firm. 这 tired of working for others，是不是可以说是主补，同位语，分词短语作独立主格原因状语的，都行?

问题 长难句分析与翻译

Auditors will be concerned to see that managers have put in place risk assessment processes that are capable of identifying risks on a timely basis, and have designed robust risk management processes and internal control systems.请问这句该如何翻译？

问题 非谓语(为什么填不定式)

Each requires skillful movements and precise timing, and is a lot of fun ____(watch).答案是to watch 请问老师此处为什么填to watch？

问题 leading up to the procedure是什么意思

They may experience feelings of extreme dread and elevated heart rate leading up to the procedure.他们会在这一过程中感到由之产生的极度恐惧并心跳加速。lead up to是导致，致使的意思，leading up to the procedure翻译无法理解，在句中作什么成分？

问题 方式状语可以修饰状态动词be吗

...宠坏的孩子一样。 His old teacher greeted him like a long-lost brother. 以前的老师和他见面时就像失散多年的兄弟一样。 He was so tired after all his exertions, he slept like a baby. 一番辛苦后他累极了，睡得像个婴儿。 但是下面一句 like...

问题 并列谓语

The UN, in handling Africa-related issues, needs to respect the will of the African people, enlist the AU and other regional and sub-regional organizations in Africa, and encourage and support Africa’s own initiatives and solutions.老师您好，请问 and encourage and support 为什么要两...