zhdr老师三个英语问题：（网上查不到,我姐姐的字典不好用.这些问题对别人应该也有用）

zhdr老师三个英语问题：（网上查不到,我姐姐的字典不好用.这些问题对别人应该也有用）
【1】lt doesn't add to my confusion about your predicament.
it是形式主语么-----我觉得不是,您觉得呢?
【2】unti用得不习惯,读起来都变成变扭了.
似乎在肯定句为 直到.为止
否定句为 在.之前------似乎意思相同,但是否定句又只能用 在.之前
we work until 10 o'clock
he didn't get up until 8 o'clock
【【【认真思考一下,还是都可以用 直到.为止.
难题：1.Her work changed the way people think about chimps.
One important thing she discovered was that chimps hunt and eat meat.（untile then）everyone had thought chimps ate only fruit and nuts.
then 指代前文的发现,until 为直到.为止
2.强调句（一下的思考对不对）：it was not until then that i realize my mistake（其实这个没老师说的恐怖）
it was not 全部句子的否定,而后面是 直到那时,我发现错误.就是
i did not realize my mistakes until then.
[[[[[[[我想问的是强调居的 until then 可不可以放在句子末尾?until then只是介词结构.】】】】】】】】】
【3】the other day i came across a book that you might like
when i was doing shopping in the market the other day
为什么前面the other day没有介词 on或者in.
--------------------
天天问你问题,你会不会觉得烦?
我很内向.
【【【【【【【不用“着急”回答我的问题,有空就行了.反正我问的不一定会被考到】】

你提的问题有些乱,整理了一下,大概包括如下几个方面的问题. 1、关于it的四种用法暨回答你的疑问 1）人称代词：指代已知的或上文中提到的中性名词,包括事物、动物和不知性别的人.如： Polish the table until it shone.把桌子擦出光亮.It is chasing a cat.它在追一只猫.Who is it knocking at the door?是哪位在敲门呀?It doesn't add to my confusion about your predicament.有关你的境遇前面提到的那件事并没有给我增加我任何迷惘.【这是你提到的第一个问题.句中的it不是形式主语,而是指代上文提到过的一件事.】 2）非人称代词：指代时间、天气、距离、度量衡、情况等.如： It is Sunday today.今天是星期日.It was fine that day.那一天天气晴朗.It is not far from here.离这里不远. 3）强调代词：用“it is +强调成分+ that/who”指代要强调的部分.强调句是用来强句子主语、宾语、状语的.以你提到的句子为例： 　I did notrealize my mistake until then.【注意句中用的是过去时态,因此强调句应该用it was … that,】 强调主语：It was (I) that/who did not realize my mistake until then.强调宾语：It was (my mistake) that I did not realize until then.强调状语：It was (not until then) that I realized my mistake.【由于否定词not随同until then一起提前,原谓语动词不在需要助动词did,所以要改用过去式realized】 4）先行代词：用作形式主语或宾语,指代拖后的不定式短语、动名词短语或从句.如： It took him some hours to do the task.【形式主语,it指代不定式短语to do the task】It is no help going there.去那里无济于事.【形式主语,it指代动名词短语going there】I found it important to do something.我觉得做一些事是很重要的.【形式宾语,指代to do something】 　　答疑：It doesn'tadd to my confusion about your predicament中不含不定式、动名词或主语从句,由此也可以说明本句中的it不是形式主语. 2、关于until的用法 　Until表示“一种行为一直延续到某一个时间点为止就反其道而行之”,因此,只有延续的行为才能与until连用. 1）如果谓语动词具有延续性,那么这个动词就可以一直进行到until所截止的时间,如： We worked until 10 o'clock.我们一直工作到10点（就停止工作了）.The meeting continued until midnight.会议一直开到半夜（才结束）. 2）如果谓语动词是一纵即逝的瞬间动词,那么就需要把这个动词变成不进行的延续状态,也就是要用否定句表示这种不延续性,如： He didn't get up until 8 o'clock.（在8点之前他一直都在进行着不起床得延续行为）,直到8点他（反其道而行之）才起床.I did not realize my mistake until then.（在那个时候之前他一直都处于没有意识到我的错误的延续状态）,直到那个时候他才意识到了我的错误. 3、关于状语的位置 　状语是一种附加成分,位置比较顺便,不强调时一般放在句末,强调时要放在句首,如果是顺便提及,还可以插入句中.如： 正常语序：One important thing she discovered was that chimps hunt and eat meat. Everyone had thought chimps ate only fruit and nuts (until then)强调语序：One important thing she discovered was that chimps hunt and eat meat. (Until then) everyone had thought chimps ate only fruit and nuts.顺便提及：One important thing she discovered was that chimps hunt and eat meat. Everyone, (until then,) had thought chimps ate only fruit and nuts. 4、其他 　1）Her work changed the way people think about chimps.（= Her work changed the way that people think about chimps其中that是指代the way的关系代词,由于在从句中作thought的宾语而被省略.单另用一句话写就是people think the way about chimps） 　2）表示时间的名词作状语,如果前面带有this,that,last,next,the other等限定词,前面不能用介词on或者in.如： I am going to see you this week.He will leave for Beijing next month.I came across a book that you might like when I was doing shopping in the market the other day