so和only和not until在句首倒装时的区别

so和only和not until在句首倒装时的区别

so、only和not until在句首倒装时的区别
一、so位于句首时的倒装情况
1.“so+adj. / adv.”位于句首时的倒装

副词so后接形容词或副词位于句首时，其后用部分倒装：

So cold was the weather that we had to stay at home. 天气太冷，我们只好呆在家里。
So fast does light travel that we can hardly imagine its speed. 光速很快，我们几乎没法想像它的速度。
So sudden was the attack that we had no time to escape. 袭击来得非常突然，我们来不及逃跑。
2.“so+助动词+主语”倒装
当要表示前面提出的某一肯定的情况也同样适合于后者，通常就要用“So+助动词+主语”这种倒装结构：
You are young and so am I. 你年轻，我也年轻。
She likes music and so do I. 她喜欢音乐，我也喜欢。
If he can do it, so can I. 要是他能做此事，我也能。
【注意】
(1) 若前面提出某一否定的情况，要表示后者也属于同样的否定情况，则应将其中的so改为neither或nor：
You aren’t young and neither am I. 你不年轻，我也不年轻。
She hasn’t read it and nor have I. 她没有读它，我也没有读。
(2) 注意该结构与表示强调或同意的“so+主语+特殊动词”结构的区别：
"It was cold yesterday." "So it was." “昨天很冷。”“的确很冷。”
"Father, you promised." "Well, so I did." “爸爸，你答应过的。”“嗯，是答应过。”

二、only位于句首时的倒装情况
当“only+状语”位于句首时，其后句子要用部分倒装。如：
Only then did he realize that he was wrong. 到那时他才意识到他错了。
Only in this way can our honour be saved. 只有这样，才能保住我们的荣誉。
Only then did I understand what she meant. 只有到那时我才明白她的意思。
Only after her death was I able to appreciate her. 只有到她死后我才认识到她的价值。
Only when he returned home did he realize what had happened. 当他回到家里时,才知道出了什么事。
Only by shouting was he able to make himself heard. 他只有叫喊才能让别人听到他。
Only when we landed did we see how badly the plane had been damaged. 我们只是在着陆之后才看到飞机损坏的严重程度。
Only on one point do I agree with you. 只有一点，我同意你的说法。

三、当not until…位于句首时，其后的主句要用倒装语序，例如：
He didn’t leave the room until the rain stopped. / Not until the rain stopped did he leave the room. 雨停了之后他才离开这房间。

一、 only修饰副词、介词短语或状语从句，且放在句首时。例如：
Only in this way can you learn English well. 只有这样，你才能学好英语。
Only after being asked three times did he come to the meeting. 叫了三次，他才来参加会议。
如果句子为主从复合句，则主句倒装，从句不倒装。例如：
Only when he is seriously ill does he ever stay in bed. 病得狠重时，他才卧床休息。
二、 句首为否定或半否定的词语，如no, not, never, seldom, little, hardly, at no time, in no way, not until… 等。例如：
Never have I seen such a performance. 从未见过如此糟糕的表演。
Nowhere will you find the answer to this question. 无论如何你不会找到这个问题的答案的。
Not until the child fell asleep did the mother leave the room. 母亲一直到孩子入睡后离开房间。
当Not until引出主从复合句，主句倒装，从句不倒装。注意： 如否定词不在句首不倒装。例如：
I have never seen such a performance.
The mother didn\'t leave the room until the child fell asleep.
忘了so了。。
1.当“so…that..”和“such…that…”结构中的so和such位于句首,句子用部分倒装
如：
So clever a boy is he that he can work out such a problem in a short time.
Such a lovely day is it that we want to go out for a picnic.
2.so表示“也”的时候,句子用倒装语序.
He has learned to send e-mails.So have I.