问题 little的比较级和最高级有哪些形式

听说little 的比较级和最高级有三种形式： little — less, least litte — littler, littlest litte — more little, most little 请问这种说法对吗？特别是第三种，好像很少见吧？如果可以的话，它们在区别吗？

问题 than is necessary是句中的什么成分(than是什么词性)

He never say more than is necessary.没有必要的话，他从不多说[他从不说废话]。

问题 现在分词完成式的被动形式与过去分词作原因状语的区别

 Warned (warn) several times,they became more careful in doing the job.为什么不是Having been warned？

问题 which在定语从句中的用法a

In 2012 a federal court threw out a case brought by residents of Mis-sissippi against 34 big carbon emitters for harm resulting from Hurricane Katrina, which they argued climate change made more destructive.请问which的先行词是哪个？它在从句里面又做什么成分？

问题 back then 在下面的句子中是插入语吗

back then 在下面的句子中是插入语吗？ Sometimes I think how grateful I would be today if I had learned more back then about what really matters.

问题 in this day and age为什么为介词in呢

Why dress so formally in this day and age? 名词 day 前面为什么用介词 in 而不是 on 呢?

问题 and one look at him如何进行语法分析

A mischievous grin spread over his bronzed face, and one look at him, without those glasses, showed that the uniform was a disguise, that this was no sedentary bureaucrat but an out-of-doors man of action.

话题 it has been mostly sharks and seals.

话题 a red one and a green one.

问题 如何分析and for that is what America, I believe, is about. 这里的语法结构和成分？

...th the confidence of the whole people, to win the confidence of all of you and for that is what America, I believe, is about.I said at the outset, I wanted to represent - this campaign to represent and look like America. We've done that."请教老师，1) 如何分析and for that is what America, I ...

问题 while = and 同时（并例连词）

In Save Money: Good Food, she visits a different home each week and with the help of chef Matt Tebbutt offers top tips on how to reduce food waste, while _____(prepare) recipes for under  5 Yuan per family a day.问：此横线处应填preparing ,说是状语从句的省略，那我要问while作...

问题 fifteen hundred与one thousand and five hundred

Aristotle’s scientific theories dominated Western thought for fifteen hundred years. 亚里士多德的科学理论统治西方思想长达1500年之久。上面的句子摘自柯林斯词典，请问句中为什么用 fifteen hundred，而不用 one thousand and five hundred？

问题 一道专八改错题，and后面到底是省略了have还是have contributed to呢？

Throughout our history, immigrants have contributed to American society and help build the American dream 请问:可以将help改成helping吗？答案改成helped将其看作与contributed并列。那可以理解成and后面省略了have contributed to，helping…做它的宾语吗？

问题 the year 2005 and beyond(2005年及以后)

这个是什么句型?

问题 being humorous 作状语应该如何理解

...:If you feel awkward being humorous, you must practice so that it becomes more natural.【参考译文】如果你在表现幽默时觉得别扭，就必须好好练习，这样就会变得更加自然。【我的疑问】参考书上说 being humorous 是作状语。我没见过这种作状语的...