当“only＋状语”位于句首时，其后习惯上要用部分倒装。其中，only后的状语可以是副词、介词短语、从句等。
Only in this way can we learn English. 只有这样才能学会英语。
Only then did I understand what she meant. 只有到那时我才明白她的意思。
Only by shouting was he able to make himself heard. 他只有叫喊才能让别人听到他。
注意，在only后作状语的是从句时，从句不要用倒装，要部分倒装的是主句。如：
Only when it rains do you feel cool. 只有下雨时才觉得凉爽一点。
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 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。
为了强调、突出等词语的目的而颠倒原有 语序的句式叫做倒装句。
在倒装句中，颠倒了的成分可以恢复原位而句意基本不变，句法成分不变。
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。例如：
Only when the war was over in 1918 was he able to get back to work．
Only in this way can you learn English well．
Only after a bitter struggle was the aim achieved．
Only the teachers are allowed to use the room．（不倒装）
Only five men were hurt in the accident．（不倒装）
only位于句首修饰壮语要倒装 ;如 Only in this way can you solve the problem.
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 chance of
achieving my dream only then
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。如only后跟
的是主语，就不用倒装结构了。例如：
Only when the war was over in 1918 was he able to get back to work．
Only in this way can you learn English well．
Only after a bitter struggle was the aim achieved．
Only the teachers are allowed to use the room．（不倒装）
Only five men were hurt in the accident．（不倒装）
注意，only和所修饰的状语如果不在句首，则不倒装。
如：
The boy was helped out only when his father arrived in a hurry．
Only then did he realize the importance of English
只有在那时候他才意识到英语的重要性。
only then ,是过一小会儿的意思，一般用在句首，引导倒装句。
例句Only then did he realize the importance of English．
解析：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。如only后跟的是主语，就不用倒装结构了。
再比如
Only when the war was over in 1918 was he able to get back to work．(倒装句）
Only five men were hurt in the accident．（不倒装
only 放句首，表示状语时；句子需要倒装，且为不完全倒装（即把情态动词，助动词，be动词等提前，实意动词位置不变）
例如：
Only in this way, can we realize our dream. 只有通过这种方式，我们才能实现梦想。
Only when we try our best, will we succeed. 只有当我们尽最大的努力，我们才会成功。（注意，only后面的从句不需要倒装，主句倒装）
only倒装用法
一 、“only+副词”位于句首：
1、Only then did I realize that I was wrong.
只是到了那时我才意识到是我错了。
2、Only by shouting was he able to make himself heard.
他只有叫喊才能让别人听到他。
二、“only+介词短语”位于句首：
1、Only by working hard can you succeed.
只有努力工作你才能成功。
2、Only in the reading-room can you find him.
你只有在阅览室才能找到他。
三、“only+状语从句”位于句首：
Only after she died was I able to appreciate her.
只有到她死后我才认识到她的价值。
四、注意：若位于句首的不是only+状语，而是 only+宾语等，则通常无需倒装(但有时也可以倒装)：
Only a policeman the children saw in the street.
孩子们在街上只看到一个警察。
扩展资料
一、only if的用法
1、在only if 中，副词only是中心词,而从属连接词if只用来连接从句，因此，它表示“只有……(才);只有在……的时候，唯一的条件是……”的意思。
2、only if 有时也写成only…if，表示唯一的条件，但是意思不变。
二、if only 的用法
1、在if only中，从属连接词if是中心词,而副词only只是来加强if的语气的，因此，if only仅是if的一种强化形式，而不仅能表达说话人的愿望。因此，它同if一样，也能引出条件状语从句。
2、if only常常用来表达强烈的愿望或遗憾，因此，主要用在虚拟语气中，用以表达强烈的愿望或非真实条件。常被译为“但愿”、“要是……该多好啊”等。
3、if only从句在大多数情况下用作虚拟条件句，但是偶尔也有用在真实条件句的情况。
也可以改啊
Only yesterday did I write to him.
助动词提前就好了
扩展
不是啊，是说什么only 不在句首所以不可倒装
补充
Only只有在句首句子才需要倒装，不在句首就不用倒装。
如果你想把I wrote to him only yesterday改为倒装，就必须要把only yesterday 提前
您好，我是杭州jingrui老师，希望我的回答对您有帮助：
only位于句首修饰壮语要倒装 。
例： only in this way can you learn english well 。 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。如only后跟
的是主语，就不用倒装结构了。
例：
Only when the war was over in 1918 was he able to get back to work． Only in this way can you learn English well．
Only after a bitter struggle was the aim achieved．
但是，如果only后面不是状语，则不倒装。
Only the teachers are allowed to use the room．（不倒装）
Only five men were hurt in the accident．（不倒装）
注意，only和所修饰的状语如果不在句首，则不倒装。
only引导的倒装句
Only in this way, can you learn English well.
Only after being asked three times did he come to the meeting. Only then did I realize the importance of health.
到那时我才认识到健康的重要性。
Only thus can we finish the task ahead of time.
只有这样我们才能提前完成任务。
Only in this way can you learn from your mistakes.
只有用这种方式你才能从你的错误中吸取教训。Only he knows the truth.
只有他知道真相。
Only socialism can save China.
只有社会主义才能救中国。
Only she understood him.
只有她才理解他。
Only very careful readers can find this mistake.
只有非常细心的读者才会发现这个错误。
only 放句首，表示状语时，句子需要倒装，且为不完全倒装（即把情态动词，助动词，be动词等提前，实意动词位置不变）。
如：only in this way can you learn english well
扩展资料：
一、倒装句的构成：
主语和谓语是句子的核心，它们之间有两种语序
一是主语在谓语之前称为自然语序（Natural Order）；
二是主语在谓语之后则称为倒装语序（Inverted Order）。
而倒装语序中又有完全倒装（Full Inversion）和部分倒装（Partial Inversion）
1.完全倒装（Full Inversion）：又称"全部倒装",是指将句子中的谓语全部置于主语之前。此结构通常只用于一般现在时和一般过去时。
①谓语+主语+……
There be（的各种形式）+主语（+地点或时间状语）
例子：
There was a drop in the temperature.温度下降了
There are birds singing in the tree.鸟儿在树上唱歌。
②副词小品词+谓语动词+名词主语+……
例子：
Out rushed a young lady.
③过去分词或现在分词+be的各种形式+主语+……
二、英语中的倒桩手法：
在现实的语言实践中，由于语法结构的要求，或是由于修辞的需要，往往要改变句子的自然语序，把一些本应置于主语之后的句子成分提到主语之前。我们称这种语序的变化为“倒装语序”这样的倒装语序可能使句子的内在含义产生细微的、甚至明显的改变。
只有注意观察引起倒装的原因，才能更准确地理解句子的含义。为了使句子的某成分突出，我们还会使用强调，而倒装语序大多都用于强调。
参考资料：
百度百科倒装句
14.1 倒装句之全部倒装
全部倒装是只将句子中的谓语动词全部置于主语之前。此结构通常只用与一般现在时和 一般过去时。常见的结构有：
1) here, there, now, then, thus等副词置于句首, 谓语动词常用be, come, go, lie, run。
There goes the bell.
Then came the chairman.
Here is your letter.
2) 表示运动方向的副词或地点状语置于句首，谓语表示运动的动词。
Out rushed a missile from under the bomber.
Ahead sat an old woman.
注意：上述全部倒装的句型结构的主语必须是名词，如果主语是人称代词则不能完全倒装。
Here he comes. Away they went.
14.2 倒装句之部分倒装
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 the child fell asleep.
典型例题
1) Why can't I smoke here?
At no time___ in the meeting-room
A. is smoking permitted B. smoking is permitted
C. smoking is it permitted D. does smoking permit
答案A. 这是一个倒装问题。当否定词语置于句首以表示强调时，其句中的主谓须用倒装结构。 这些否定词包括no, little, hardly, seldom, never, not only, not until等。本题的正常语序是 Smoking is permitted in the meeting-room at no time.
2） Not until the early years of the 19th century ___ what heat is.
A. man did know B. man know C. didn't man know D. did man know
答案D. 看到Not until…的句型，我们知道为一倒装句，答案在C，D 中选一个。
改写为正常语序为，Man did not know what heat is until the early years of the 19th. 现在将not提前，后面就不能再用否定了,否则意思就变了。
14.3 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.
14.4 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 quarrelled 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.
14.5 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.
14.6 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。
14.7 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.
典型例题：
1） Not until the early years of the 19th century___ what heat is
A. man did know B. man knew C. didn't man know D. did man know
答案为D. 否定词Not在句首，要求用部分倒装的句子结构。
2） Not until I began to work ___ how much time I had wasted.
A. didn't I realize B. did I realize C. I didn't realize D. I realize
答案为B。
3) Do you know Tom bought a new car?
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
解析：答案为B. 句中的nor引出部分倒装结构，表示"也不"。由 so, neither, nor引导的倒装句，表示前一情况的重复出现。其中, so用于肯定句, 而 neither, nor 用在否定句中。