英语语法老师几个问题But there is also time for brief diversions onto b

英语语法
老师几个问题
But there is also time for brief diversions onto bizarre ground,such as a discussion of the skyscraper index (which holds that a boom in skyscraper construction is a foolproof sign of an imminent recession)这里的there is also time for是相当于it is time to 括号里的内容是定语从句套宾语从句吗?which是作主语吗?hold that是不是相当于think that.
Mr.Smith's book serve as an excellent introduction to a vast subject这里是不定式作 introduction
In what way is the year 2008 historic又是什么意思?
introduction那里是作定语还是宾补?it serves as a guide to arts and commerce这里的to do也是宾补吧.I have an important lecture to attend这句为什么是定语不是作状语我都有点混淆了,怎么区分?

But there is also time for brief diversions onto bizarre ground, such as a discussion of the skyscraper index (which holds that a boom in skyscraper construction is a foolproof sign of an imminent recession)这里的there is also time for不是相当于it is time to do
前者是有时间 作某事 后者是该 做某事
括号里的内容是定语从句套宾语从句
which是作主语 hold that不是相当于think that.而是means that 因为 think的主语不成立
Mr.Smith's book serves as an excellent introduction to a vast subject这里没有不定式
to a vast subject是介词短语作定语 修饰 introduction
In what way is the year 2008 historic= the year 2008 historic is in what way
as an excellent introduction 是状语
it serves as a guide to arts and commerce这里的 as a guide to arts and commerce是状语
to arts and commerce是定语 修饰 a guide.
本句没有宾语 所以也没有宾补
再问： 一般来说there is time for sb to do sth这里的there is also time for有这个句型吗？ as an excellent introduction as a guide to arts and commerce都是as引导的方式状语？ 定语一般是修饰名词的，还有一种情况是有动宾关系也可以是定语？比如lecture to attend？
再答： there is time for sb to do sth这是there be 句型 for sb to do sth不过是 不定式的复合结构 作定语 修饰 time 它与 it is time for sb to do sth句型 的 意思不一样 你的句子 for 短语是定语 as an excellent introduction as a guide to arts and commerce是介词短语作作状语 as是介词 作为 的意思 定语是修饰名词的， lecture to attend是不定式作定语 与所修饰词是动宾关系 但 不定式的逻辑主语 须是句子主语 如 i‘ll have a lecture to attend