请教一下各位老师，以下两个句子：I need a pen to write with.The chair looks rather hard, but in fact it is very comfortable to sit on.都是“名词+to+vi+介词”的形式，为什么一定要用介词？第一个to do是做目的状语吧？第二个是做方面状语？谢谢。
Two hundred years ago,when sport was confined largely to games played in the backyard or on the farm,one could hardly have imagined the attention that it has come to receive in 21th century.请问这句话中has come to receive的come to该如何理解?是理解为逐渐吗？
The two giant pandas costs about 1m pounds a year to lease from China.两只大熊猫的租金为每年100万英镑.问题如下：这里的to lease from China在句子中做什么成分呢？我个人目前的思路如下：1.
首先不是同to do做后置定语，因为假如是的话，...
...Friday's
game，而这个却不加's呢？
3.I
will go home in two weeks for summer vacations.
答案说vavation不可数，不加s，字典上显示的是可数。vacation与holiday哪个在什么情况下可以用复数，这俩词区别在哪里？有说summer
holiday/vacation的，有说summer...
...家请教一个计算天数的问题：A new restaurant opened the day before yesterday.= A new restaurant has been open for______ days.请问横线处的答案是three还是two？我以前了解到一个说法“计算天数用大日期-小日期+1”，即：如果一件事开始于3月5日，结...
—Why didn’t you go to Water-park? It was so exciting.—I _____ to, but my uncle came suddenly. A . wished B. hoped C. meant D. expected 【答案】C【疑问】 expect 也可以表示“打算”，例如：I expected ...
Policymakers turned their focus to public education as a matter of national security, one too important (and potentially too profitable) to entrust to educators.政策制定者随后将关注点转向公共教育领域。在政策制定者看来，公共教育已上升至国家安全的高度，其...
A seem to be going well.为什么有的材料说seem to是复合谓语和have to一样。分析方法一：seem to be做复合谓语的话，going就是动名词做宾语，well副词修饰什么？分析方法二：如果seem是谓语的话，to be going是不定式的进行体作为宾语。就是...
...，不能用于表推测？ 2.No one else could have
done it – it had to be Neville.If Bley was aboard, he had
to have heard me.They have to have seen her
rocket burning as she makes her landing approach, coming in ass-backward. have to表示对过去的推测时，以下三种形式我搞不清...
1. 麻烦问一下 what A to B is what C to D 这句话语法有没有正确，如果正确，这句话是怎么样一个语法结构？2. 还有 what C is to D, that A is to B 中that是否可以省略，这句话是什么一个结构？3. Just as C is to B，A ...