问题 regret 的用法疑惑

发现有些例句有regret at/for sth这种用法； 但是查了字典发现主要是regret sth/ to do sth/ doing sth 所以想请问 regret for sth用法是否正确？

问题 关于冠词的问题

cover an area of...has a history of ....at a speed of ...has a population of些短语中为什么用a而不用the 呢，of 介词短语不是修饰限定的作用吗？谢谢老师！

问题 这里的it指代什么

She found a therapist for me. Then l started taking the classes. At first，it seemed a little strange.

问题 现在完成时和一般过去时

...en 请问老师，这可以看作是现在状态或过去的状态选A和B吗？for a long time  不仅可以用于完成时也可以用于其他时态啊，所以这里我就不明白了。2）.Where is Jim？— He has gone to England.这个句子用现在完成时是强调对现在的...

问题 关于“转态事件不可以和频次状语连用”，可否给出相关语法介绍？

close, leave, buy, join, become, begin, fall，fall ill，get to(know), come, go, see, hear, hear from, catch a cold, kill 】这类动词现在完成时与频次状语连用是不是也需要先变成对应的延续性动词呢？谢谢!

问题 Have done 和 have been doing 的区别. 请问此处填哪个更合适，或者都行？有

问题 请讲解这一题！另外我想知道， not except 和not but的区别是？

问题 Glories are suppose to be achieved.这句话怎么划分句子成分和结构

问题 动名词和不定式作主语的区别相关疑问

For John to win the marathon suprised us.For John to have won the marathon suprised us.John's winning the marathon surprised us.第一、二个句子是我自造的不知道正确否？这三个句子在意思上有什么区别？动名词与不定式作主语到底有什么本质上的区别呢？

问题 Fridays和Saturdays怎么会是nights呢【续】

...意思很正常：Fridays and Saturdays are regular disco nights. 星期五和星期六的晚上通常就是迪斯科之夜。（此处的Fridays and Saturdays其实是指Fridays and Saturdays的“晚上”）又如：Meetings, and the time for them, are a considerable management expense. 会议及...

问题 want to A and B 和 want to A and to B 哪个是正确

专业老师好！want to do sth and do sth和want to do sth and to do sth，哪个是正确？请问，want后用and连接两个动词第二个动词还用加to吗？有疑惑，望解答，谢谢。

问题 “in+名词”是什么状语

The city’s growth in importance as an economic center has been slow.1.请问in importance是做方面状语吗？2.In importance可置于句末变为以下句子吗？即：The city’s growth as an economic center has been slow in importance.

问题 no otheriwse than 这里是什么意思

...这个比较分句... be so very accomplished as they all are. 这里的so和as有区别吗？这个句子尤其是as they all are应该怎么理解含义呢？另一个不懂之处就是no otheriwse than这里是什么意思？没看懂。

问题 介词in用法疑问

There was an applicant in just yesterday dropping off a resume in person.请问老师这里为什么用了介词in？不要可以吗？

问题 Where there are shifts in food types involving..分析

Where there are shifts in food types involving reduction in food hardness or changes in how these foods are processed, most investigators have found a reduction in gross wear.能详细分析一下：Where there are shifts in food types involving reduction in food hardness or changes in how these foo...