Only when class began_____that he had left his book at home.A.will he realizedB.he did realize

Only when he got on the train _________ that he had left his mobile phone at home． A．he real.~

D 考查：only+状语放在句首，使用部分倒装。根据时态所以选D。

B 考查倒装，only + 状语开头句子采用倒装。 句意：只有当他做了那件事后他才意识到他犯错误了。

这是一个由only引导的倒装句，所以这里用did he realize。
在句首的only如果后面跟了副词、介词短语或从句等状语，则主句用倒装结构。但如果only后跟
的是主语，就不用倒装结构了。

倒装句就是将正常的陈述语序加以变化，主要作用是强调被提前的部分。
倒装句可分为全部倒装和部分倒装两种：
一、全部倒装
谓语动词提前至主语之前为全部倒装，如：
Out came his guest.
On the hill stood a little cottage that contained heaps of hay.
There lived an elderly lady whose husband died long ago.
二、部分倒装
助动词或情态动词提至主语之前，谓语动词位置不变，即为部分倒装，如：
Neither could he see through your plan.
So little did I know about him that I was easily taken in by his words.
Doesn't her invitation appeal to you?
第一节 否定词提前倒装
否定词用于句首时，句子应进行部分倒装
否定词常用的有：
Not only…(but also), 　　　　　　　Not until(直到…..才),
No sooner….(than)(一…..就) Never/ Rarely/Seldom
Hardly/Scarcely… (when) Few/Little
Neither/Nor (也不)　　　　　　　 Nwhere
At no time　　　　　　　 Under no circumstances(决不)
On no account (决不)　　　　　　　In no way
其中not only, no sooner, hardly, scarcely 分别和but (also), than, when搭配使用，需注意：后一组词之后的部分不进行倒装，只有否定词之后的部分倒装
如：Hardly had I arrived home when it began to rain.
Not only was he able to enter the final round of the contest, but he came out first as well.
No sooner had I got any chance to speak than the clerk slammed the door in my face.
Seldom does he travel about.
Under no circumstances should you betray your own country.
此类倒装句一般出现在填空题中，需填入的是倒装部分，只要在句首见到上述的词，就应条件反射的想到用倒装句。

希望对您有帮助，满意请采纳，谢谢！O(∩_∩)O

only+状语放句首，部分倒装
部分倒装就是用疑问句的形式来倒装
he realized......陈述句
did he realize.....一般疑问句
就是疑问句形式

用 did 吧

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汶上县18415393987： only 从句+倒装)英语句子 - ？
宗圣油众益： only 的用法 .only位于句首修饰壮语要倒装 只有倒那时我才将会有机会实现我的梦想. will 是谓语的一部分因倒装提前了.再如 only in this way can you learn english well 是only引起的倒装句,will 是助动词,如果这个句子正过来说就是 I will have a ...

汶上县18415393987： Only when class began - _____that he had left his book at home. - ？
宗圣油众益：[选项] A. will he realize B. he did realize C. did he realize D. had he realized

汶上县18415393987： Only when class began - ______that he had left his book at home. - ？
宗圣油众益：[选项] A. will he realize B. he did realize C. did he realize D. should he realize

汶上县18415393987： 英语翻译1.I try to a few minutes every day to do exercises.set aside 2.Only when class began that he had left his book at home.did he realize3.The book is said ... - ？
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汶上县18415393987： Only when class began - ----that he had left his book at home.A.will he realizedB.he did realize - ？
宗圣油众益： only+状语放句首,部分倒装 部分倒装就是用疑问句的形式来倒装 he realized......陈述句 did he realize.....一般疑问句 就是疑问句形式

汶上县18415393987： only放句首的部分倒装句 - ？
宗圣油众益： 答案没错,only放句首的部分倒装是针对主句谓语动词的,而不是从句谓语动词.在本句中谓语动词已经体现部分倒装...will you get..., you come在时间状语从句中不用倒装.

汶上县18415393987： Only when - ----------------.？
宗圣油众益： 答案B 本题考查倒装.only引导的状语位于句首,主句用部分倒装.故选B.

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汶上县18415393987： 英语黄金句式 - ？
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