14.notuntil I shouted at the top of my voice ______ his head

He didn't turn his head until I shouted at the top of my voice.
直到我用最大的嗓门喊他时他才回过头来.
原句是这样的.
这一句话是一句否定词开头的倒装句,一般用来表示强调.
主句就是全句的 至少是主语和谓语所在的地方,所以如果你对句子的结构熟悉的话你可以找主语谓语来确定主句.
但是更简单的方法是找引导词 which when where whose that if whether等等,跟在引导词后面的就是从句.
比如,
你给出的例句它可以改写成: He turned his head when I shouted at the top of my vioce.
或者When I shouted at the top of my voice, he turned his head.意思不变.
这是一个when引导的时间状语从句,意思是when后面的从句在主句中充当状语的成分.
在这句中 主语是 He 谓语是turned,主句就是He turned his head ,
从句由when 引导,从句就是I shouted at the top of my vioce.
然后回到Not until i shouted at the top of my voice did he turn his head.这句话,
主句是he turn his head,从句就是 i shouted at the top of my voice .
只不过这里是个倒装句型,要注意语法.
如果你难以判断这种类型的主句和从句,那就建议你先将它改写成when之类的引导词引导的正常语序的句子,然后再用'when'后面的就是从句,这样的法则就可以了.
知识拓展：
部分倒装是指将谓语的一部分如助动词或情态倒装至主语之前.如果句中的谓语没有助动词或
情态动词,则需添加助动词do, does或did,并将其置于主语之前.
1、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.
　　Never have I seen such a performance.
　　Nowhere will you find the answer to this question.
　　Not until the child fell asleep did the mother leave the room.
　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.
　　I have never seen such a performance.
　　The mother didn't leave the room until.
2、以否定词开头作部分倒装
如 Not only…but also, Hardly/Scarcely…when, No sooner… than
　 Not only did he refuse the gift, he also severely criticized the sender.
　 Hardly had she gone out when a student came to visit her.
　 No sooner had she gone out than a student came to visit her.
典型例题
No sooner___ than it began to rain heavily.
A. the game began　　　　　 B.　has the game begun
C. did the game begin　　　 D.　had the game begun
答案D. 以具有否定意义的副词放在句首时,一般采用倒装句(谓语前置).这类表示否定意义
的词有never, seldom, scarcely, little, few, not, hardly, 以及not only…but
(also), no sooner…than, hardly… when scarcely… when　等等.
注意：只有当Not only… but also连接两个分句时,才在第一个分句用倒装结构.如果置于句
首的Not only… but also仅连接两个并列词语,不可用倒装结构.
Not only you but also I am fond of music.
3、so, neither, nor作部分倒装
表示“也”、“也不”的句子要部分倒装.　　　　
　 Tom can speak French. So can Jack.
　 If you won't go, neither will I.
典型例题
　 ---Do you know Jim quarreled with his brother?
　 ---I don't know, _____.
　 A. nor don't I care　　B. nor do I care　　C. I don't care neither　　D. I don't care also
答案：B. nor为增补意思"也不关心",因此句子应倒装.A错在用 don't 再次否定, C neither 用法不
对且缺乏连词. D缺乏连词.
注意：当so引出的句子用以对上文内容加以证实或肯定时,不可用倒装结构.意为“的确如此”.
　 Tom asked me to go to play football and so I did.
　 ---It's raining hard.　　　---So it is.
4、only在句首要倒装的情况
Only in this way, can you learn English well.
　 Only after being asked three times did he come to the meeting.
　 如果句子为主从复合句,则主句倒装,从句不倒装
　 Only when he is seriously ill, does he ever stay in bed.
5、as, though 引导的倒装句
as / though引导的让步从句必须将表语或状语提前 （形容词, 副词, 分词, 实义动词提前）.
注意：
1）句首名词不能带任何冠词.
2）句首是实义动词, 其他助动词放在主语后.如果实义动词有宾语和状语,　 随实义动词一起放在主语
之前.
　 Try hard as he will, he never seems able to do the work satisfactorily.
注意：让步状语从句中,有though,although时,后面的主句不能有but,但是 though 和yet可连用.
6、其他部分倒装
1）so… that 句型中的so 位于句首时,需倒装.
　 So frightened was he that he did not dare to move an inch.
2）在某些表示祝愿的句型中：
　 May you all be happy.
3）在虚拟语气条件句中从句谓语动词有were, had, should等词,可将if 省略,把 were, had, should
移到主语之前,采取部分倒装.
　 Were I you, I would try it again.