问题 现在完成时的用法疑问

这句话中为什么要用现在完成时，还有in exchange for 当什么成分，求指教！ I’ve offered to do the job in exchange for a week’s accommodation.

问题 定从和同位语从句区分

Skills have to be paid for in the same way that goods are paid for at a shop. 请问这句话是定语从句还是同位语从句，网络上说这里that可以改成in which，这要怎么理解？

问题 动态动词加一段时间的问题

It stopped raining for a while,but now it is raining again.I lost my wallet for 2 days,but I found it in the morning.请教老师这里的stop与lose为动态动词，也不是表示目的，为什么可以跟一段时间呢。

问题 ...than is good for her用得对吗

这个句子来自四级考试题目。than 后面可以直接加 is good for her？ 怎么感觉完全不通啊。如果不对那正确写法应该怎么写呢？

问题 for any of us actors如何理解

There'll be no work for any of us actors.用 of our actors 不是最好吗？ us 不能加名词吧？在小说里看到的，还有许多这情况……

问题 ​because, as, for, since, now that 的区别

because, as, for, since, now that 表示原因，有什么区别？最好举几个例子，谢谢！

问题 It's all for a good cause.是什么意思

在小猪佩奇里经常遇见这句台词.当顾客觉得东西很贵,然后营业员就冒出这句话:It's all for a good cause.这究竟是什么意思?  它怎么断句? all看作是一个名词, for a good cause作all的定语?

问题 (请教刘老师)非限定从还是限制性定从？

For many cities in the world, there is no room to spread out further,of which New York is an example.1.of which New York is an example.在这是不是非限制性定语从句?不是的话是什么从句？2.For many cities in the world是做主句的状语还是从句的状语?以及它是什么状...

问题 cause for 和cause of的区别

cause for    ....的理由cause of     .... 的原因但是看了很多例子.它们的用法有很多是类似的.很多情况分不清该用哪个词组请问老师这两个词组有什么明显的区别吗

问题 Thank you for your doing sth有错吗

Thank you for your helping us.有人认为这个句子中的your用得不对，为什么啊？

问题 You are suitable to be a teacher对吗

...查了词典也没找到这句式。我查到句式是：You are suitable for this job.This job is suitable for you.It is suitable for you to be a teacher.It is suitable to go home at once. The food is not suitable to eat in winder.(该句中eat形式上主动，意思上是被动的)

问题 For her to back off-you know充当什么成分

For her to back off-you know,just give me some space.For her to back off-you know 在这里介词短语充当什么成分？请详细点，谢谢！

问题 wherever whenever and however works best for us有错吗

We are taking advantage of various online programs for further study, which allow us to learn wherever whenever and however works best for us.这句话有没有问题啊？标红的连词有没有问题?  

话题 be in for a shock

话题 champion for sb to do