Often did we warn them not to do so怎么 变成一般语态.

Often did we warn them not to do so怎么 变成一般语态.
Often did we warn them not to do so
怎么 变成一般语态.

Often did we warn them not to do so怎么 变成一般语态.
We often warned them not to do so.
did倒装啊,助动

We often warned them not to do so.
这是一个倒装句，属于倒装中的半倒装。
英语句子的自然语序是主语在前，谓语在后。如果把谓语或谓语的一部分置于主语之前则称之为倒装。还有一种倒装情况，即句子的主谓顺序没变，但是 句中某一成分提前了（通常是宾语、表语和状语）。
倒装可分为两类：语法倒装和修辞倒装。
1.语法倒装
（1）...

全部展开

We often warned them not to do so.
这是一个倒装句，属于倒装中的半倒装。
英语句子的自然语序是主语在前，谓语在后。如果把谓语或谓语的一部分置于主语之前则称之为倒装。还有一种倒装情况，即句子的主谓顺序没变，但是 句中某一成分提前了（通常是宾语、表语和状语）。
倒装可分为两类：语法倒装和修辞倒装。
1.语法倒装
（1）疑问句的倒装。
疑问句的倒装属于部分倒装。例如：
Are you going to the classroom?
How long have you worked here?
(2) there be (或there+其他表示状态的动词)结构中的倒装。
此类倒装属于全部倒装。例如：
There is a lake near our university.
There stands a table in the room.
(3) 虚拟语气中的倒装。
虚拟语气中省略if时，主谓部分倒装。例如：
Were I a teacher (=if he should come…), what would you do then?
Had we made adequate preparations (= if we had made…), the party would have been a success.
(4) 让步状语从句中的倒装。
1由as, however (no matter how), though和be 引起的让步状语从句要部分倒装。例如：
Much as he likes physics, he likes mathematics better.
Try as I might, I couldn’t lift the box.
However hard I try, I cannot understand the question.
Close though the union of small particles is, we have found ways of breaking them.
Be the rain ever so heavy, I will go there this evening.
2在than 等引起的比较状语从句中， 有时主谓倒装。例如：
The molecules of gases move more freely than do those of liquids and solids.
Copper wire allows a large current than does iron wire.
(5)以so, neither或nor 开头的倒装。
这种倒装表示上文所说的事也适合于另一个人或无，属部分倒装。例如：
“I am impressed by his dancing.” “So am I.”
“I can’t tell English from German.” “Neither can I.”
[注] 如表示对另一方所说的话表示赞成，则不能用倒装。
“He studies hard.” “So he does.”
(6) 句首是某些副词或不及物动词与系动词be连用时的倒装。
这些副词有here, there, now, hence(因此), then, thus, often, so 等，常主谓倒装。例如：
Now comes your turn.
Here is the book you want.
Hence comes the name magnet.
Here he comes.
(7) 表示祝愿的句子中的倒装。例如：
May our country become prosperous and strong!
2. 修辞倒装
(1)表示方位的副词或介词短语放在句首时的倒装。
表示方位的副词如:out, in, down, up, away, on等或有此意义的介词短语放在句首时，主谓全部倒装（表示描述）。例如：
Down came the ceiling.
Into the sky went the plane.
(2)否定词置于句首时的倒装。
含有否定意义的副词或词组用于句首或词组用于句首做状语，要用部分倒装。常见的这类词有：never, hardly, scarcely, not only, little, seldom, not until等，以及含有no 的一些词组如：at no time, by no means, in no case, in no way , on no sccasion, on no consideration,under no circumstances等。另外，具有否定意义的：
not…onlybutalso…,neither…nor…,no sooner…than…,hardly(scarcely)…when…位于句首时也要用倒装。例如：
Never before have I seen such a comfortable car.
Hardly had he come back when it began to rain.
At no time will China first use nuclear weapons.
(3)only+ 状语用于句首的倒装。
当only+状语用于句首表示强调时，主谓部分倒装。例如：
Only by practice can we improve our spoken English.
Only if you study hard, can you pass the examination.
(4)强调倒装
如果强调某一句子成分，把该句子成分放在句首，主谓全部倒装。例如：
Next door to us lives an engineer.
Among the students are those who come from the U.S.
(5)so(such)…that结构用于句首时的倒装。例如：
So angry was he that he couldn’t speak.
Such was the force of the earthquake the almost all the buildings in this city were destroyed.
(6)由平衡关系引起的倒装。
当主语较长，谓语很短时，为了使句子平衡把某一成分放在句首，主谓全部倒装。例如：
Gone are my friends from the cotton fields away.
Present at the conference were General Manager, Vice-general Managers and 215directors

收起