话题 fail to do sth everywhere

话题 be easy to do sth

话题 have yet to do sth

话题 be about to do sth

话题 be too difficult to do

话题 involve sb to do sth

话题 seem not to do sth

话题 intend sb to do sth

话题 demand sb to do sth

话题 wish sb to do sth

问题 it is typical of sb to do sth的若干个难点问题

关于前面讨论的“it is +形容词+ of sb to do sth”句式，我还有一个问题：It is typical of sb to do sth难点一：这里的 typical 不像是表示品质特征和聪明程度吧？为什么也可以这样用？难点二：这个句式也可以用 sb 作主语吗？比如：Sb is ...

问题 如何判断to do

As the forests get smaller and other human activities cause more problems, pandas cannot find enough to eat and they are having fewer babies.老师好，这句话中，to eat 作什么成分？作目的状语？还是作定语修饰enough?

问题 情态动词表示推测的疑惑

---Did Mary come?---I don’t know. She ________ while I was out.A. might come       B. might have come  C. could come    D. must have come老师，题目答案B，但是这题选 AC的话不能表达对过去的推测吗？是因为I don’t know的时态吗？

问题 be without sb to do sth用得对吗

在一篇书面表达的标准范文里看到如下的一句：Being without anyone to help her, the woman had to do everything herself.请问句中的 Being without anyone to help her 用得对吗？

问题 so单独引导一个句子是什么词性

1. That is nice. So I want it.句中 so 前面是个句号，而 so 只引导了一句话，它不是并列连词吗？难道也是句子副词？2. So why don't you leave? 那么你为什么不离开呢？这句中 so 是“那么”，感觉好像是个语气词，请问这个 so 是什么词...