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问题 in two to four seconds是点时间还是段时间

...对于时间状语的用法有一点疑问，自己不太懂。But it is interesting to note，in the present research，that monkeys respond to stimulation in two to four seconds.这个句子出于美国动物世界！我想问下、这里in two to four seconds是点时间还是段时间？另外...

问题 介词短语所做的成分(in part because of the tariffs)

China's economy is already slowing, in part because of the tariffs.请问这里的 in part 介词短语作什么成分？是特殊的副词吗？

问题 in case引导的从句要用虚拟语气吗

有人说，in case 引导的从句要用虚拟语气，是这样吗？若确实要用，用什么形式的虚拟语气？谢谢！

问题 in order that ... so that...

We bought a small dog _______ it would be easy to handle.请问填写in order that 或 so that 都可以吗？后半句是表目的吗？还是表结果？谢谢老师回答。

问题 join sb 与 join in sb

Do you want to join us?上面的句子出自高中英语新教材人教版必修一第1单元（p28）。请问这里的 join us 可以说成 join in us 吗？

问题 定冠词the在in the morning，at noon中的使用。

同样是表示时间，为什么在in the morning / in the evening 中要使用定冠词the；而在at noon/ at night 中却不适用the

问题 “参加考试”可以用 take part in an examination 吗

有这样一句填空题:The girl is taking the entrance examination for __________ in Beijing. During the exam, the student next to her fainted.这里的 taking the entrance examination 意思是“参加考试”吧？请问可以将 taking 改为 taking part in 吗？

问题 as it was in Roman times是定语从句还是方式状语从句

His novel describes life as it was in Roman times.请问专家: 句中的 as it was in Roman times 是定语从句还是方式状语从句?

问题 在keep in mind,take into consideration等后要不要用it作形式宾语

例句：1）We must keep in mind that love tastes different to everyone.2）We must keep it in mind that love tastes different to everyone.请教一下，在诸如“keep in mind”“take into consideration”这类成语动词后面，要不要使用it作形式宾语？

问题 stand是动词还是系动词的判断(stand in total contrast to)

The poverty of her childhood stands in total contrast to her life in Hollywood.stand是动词还是系动词？作什么成分？

问题 类似what remains of confidence in markets的表达形式

If the financial system has failed, what remains of confidence in markets? 这个句子中，what remains of confidence in markets这种结构形式比较特别。有类似结构(what +v+介词短语，其中介词短语为what的定语）的动词除了remain,还有哪些？能否提供一两...

问题 in the past few year和 for the past few year有什么区别

He has doubled his height in the past few years.He has been in United States of America for the past few years.in / for  the past few years 用法以及语意上究竟有什么区别呢?

问题 如何分析：phone in sick（打电话请病假）

书上说 phone in sick 的意思是“打电话请病假”，请问这个短语如何分析？尤其是其中的 sick 是什么成分？

问题 类似have difficutly in doing sth的句式

have difficutly in doing sth 句式的意思是“做某事有困难”，请问老师：类似这样的句式多吗？主要有哪些？谢谢！

问题 implicate和implicate in

...hers suspect that the tailpipe exhausted from cars and trucks--especially tiny carbon particles already implicated heart disease, cancer and respiratory ailments--may also injure brain cells key to learning and memory. 请问: 为什么implicated后面要加in？它不是及物动词吗？