问几道英语语法题目1.it was not until ___ the problem difficult to wor

问几道英语语法题目
1.it was not until ___ the problem difficult to work out that i decided to ask tom for advice.为什么不用did i find要用i did find
2.it remains__whether jim'll be fit enough to play in the finals
选项是to be seen 为什么要用被动而不是to see
3.i ___ in london for many years ,but i've never regretted my final decision to move back to china.
有for many years了 为什么不用had lived 而是lived
4.the moment the 28th olympic games ___ open, the whole world cheered为什么是were declared而不是declared
5.while she was combing her hair ,__,breaking to pieces
答案是down fell the mirror 我选了down did the mirror fall
这种题目有什么规律的吗?
jim’ll = jim will

替你回答完：
1、同意楼上说法.not until句型可以这样演变：
I didn't decide to ask Tom for advice until I found the problem difficult to work out.-->把not...until提到句首,使用倒装：
Not until did I find the problem difficult to work out,I decided to ask tom for advice.-->用it was...that改为强调句,不用倒装：
It was not until I found the problem difficult to work out that i decided to ask tom for advice.
2、remain to do sth知道动作是谁执行；
remain to be done不知道动作执行者是谁.
It remains to be seen whether Jim'll be fit enough to play in the finals.杰姆是不是能跻身决赛仍然有待观望.由于不知道是哪些人观望,不知道谁来执行see这个动作,因此用to be seen.
3.I ___ in London for many years ,but I've never regretted my final decision to move back to china.
现在完成时是现在的时态,指的是过去的动作延续到现在或对现在造成的影响,而你的这个句子根据上下文,“我”已经不再在伦敦了,属于过去了.所以用过去时.如果“我”现在还在伦敦的话那就用现在完成时了.
4.the moment the 28th olympic games ___ open,the whole world cheered为什么是were declared而不是declared
因为是被人宣布开幕,the moment the 28th olympic games自己不能宣布,又不是人,所以用被动.
5.while she was combing her hair ,__,breaking to pieces
这里用了英文的一种倒装句型：
地点状语放于句首,整个句子用完全倒装(down did the mirror fall为部分倒装)：
地点状语+谓语动词+主语.也就是
down(地点状语) fell(谓语动词) the mirror(主语)
又比如：
In front of the house stands a tree.
On the river lives an old man.
Up flying is the plane.
Down falling is the leaf.
In bed lying is Marry.