问题 a lot of it is genetic. 介词后面加句子

There are much bigger contributors to our weight and a lot of it is genetic.介词+句子???

问题 sth is available to do 结构

科斯林available词条有一例句，Since 1978，the amount of money available to buy books has fallen by 17%.该句用了available to do sth作后置定语，简化得sth is available to do sth.但是available好像没有这种结构吧？？？即使有，那么to do作什么成分呢？？？

问题 the place is worth visiting。

想问 worth是表语，那么visiting是什么成分？谢谢

问题 not否定哪个成分

1. He is no fool. 2. He is not a fool.    3. He is not fool. 句1中 no 否定名词 fool？句2中 not 否定 is? 句3中 not 是否定 is 还是否定形容词 fool？

话题 sb is hurt to do sth

话题 than is necessary to do sth

话题 There is no subject to which

话题 A horse is a useful animal.

话题 The bride to be is Mary

话题 there is sb/sth doing sth

话题 It is sb/sth doing sth

问题 强调句的that

... doesn't matter_______I'm talking to.A.    Who is it    B.   who it is    C.   it is who    D. it is whom    答案选B。 个人理解：it为形式主语，真正主语为who引导的主语...

问题 语法分析求助：there is uncertainty about the outlook six

经济学人Economist上的一个句子，我能看懂，但觉得有点别扭。请老师答疑，Many thanks！！ 有疑惑的句子：「there is uncertainty about the outlook six or 12 months out. 」问题1：这个outlook six or 12 months out应该理解成「6到12月之【后...

问题 It is adj of/for sb to do sth的句子成分

It is very nice of them to help me out.It is important for us to master the cues of computers．for me, of sb 作什么成分？

问题 ​It is difficult to do sth的句子成分

It is difficult to understand what she's talking about.请问句中的to understand是什么成份？谢谢！