prevent的语法是什么

1. 阻止，妨碍，防止，阻挡，制止，避免
2. 先做
3. 先去，先来，先行，先走一步
4. 预防，防害
5. 预先
6. 迎合（愿望）
7. 预先应付（问题）
8. 【宗】引领
9. 约束，不准，杜绝，抵触
10. 行动在之前
11. 冲突

1. keep from happening or arising; make impossible;

   "My sense of tact forbids an honest answer"
   "Your role in the projects precludes your involvement in the competitive project"
   

2. stop (someone or something) from doing something or being in a certain state;

   "We must prevent the cancer from spreading"
   "His snoring kept me from falling asleep"
   "Keep the child from eating the marbles"
   

1.防止；预防；阻止
Toprevent something means to ensure that it does not happen.

e.g. These methodsprevent pregnancy...
这些方法能防止怀孕。
e.g. Further treatment willprevent cancer from developing...
进一步的治疗将阻止癌症恶化。

2.阻止；制止；阻碍
Toprevent someonefrom doing something means to make it impossible for them to do it.

e.g. He said this wouldprevent companies from creating new jobs...
他说这将使公司无法创造新的工作机会。
e.g. Its nationals may be prevented from leaving the country...
其国民可能会被禁止出境。

1. We shall come tomorrow if nothing prevents.
   如没有什么阻碍的话,我们明天来。

1. Business has prevented me.
   我因有事耽搁了。
2. Sally said she would come to see me if nothing prevented her.
   萨丽说要是没有什么事情妨碍她的话,她就来看我。
3. These rules are intended to prevent accidents.
   制定这些规则,是为了防止事故。
4. Systems, however good, cannot prevent evils.
   制度再好也防止不了坏事发生。
5. They are taking effort to prevent a new civil war.
   他们正努力制止一场新内战。

1. A severe cold prevented his attending the meeting.
   他患了重感冒,未能出席会议。
2. Nobody can prevent our getting married.
   谁也阻止不了我们结婚。
3. That affair will probably prevent me coming.
   那件事可能使我来不了。
4. The rain prevented us starting on a trip.
   下雨阻碍了我们出发去旅游。
5. That didn't prevent us getting on very well together.
   这并不妨碍我们很好地相处。
6. What can we do to prevent this disease spreading?
   我们能做什么来阻止这种疾病蔓延呢?
7. He would be the man to prevent a new war breaking out.
   此人也许能阻止新的战争爆发。

prevent from (v.+prep.)

阻止,防止 stop from; keep from
prevent sb/sth from v-ing

My only idea was to prevent the woman from speaking.

我唯一的想法就是不让那女人讲话。

I am very sorry that a previous engagement prevents me from accepting your kind invitation.

很抱歉,因为我已另有约会不能接受你好意的邀请。

Let nothing prevent you from doing your duty.

不要让任何事情妨碍你尽你的职责。

This will prevent them from abusing their power and enjoying special privileges.

这就可以防止他们滥用权力,享受特权。

We should take measures to prevent the flood from threatening that area.

我们应该采取措施防止洪水威胁那地区。

Metals are usually coated with paint to prevent them from rusting.

通常在金属上涂漆以防止生锈。

What prevents rays from entering your eyes?

什么阻止光线进入你的眼睛?

His prompt action prevented the fire from spreading.

他的果断行动制止了火势的蔓延。

Who prevents their plans from being carried out?

谁会阻止他们实施自己的计划呢?

We must try to prevent our environment from being polluted.

我们应该防止环境受到污染。

I have been unavoidably prevented from coming.

我身不由己,不能前来。

I was prevented by illness from joining in the competition.

我因病未能参加竞赛。

Unless we get more funding we'll be prevented from finishing our experimental programme.

我们如果得不到更多的经费,将无法完成实验计划。

They were prevented from stealing the car by a smart policeman.

一名机警的警察使他们盗车未遂。

1. prevent的基本意思是“止”,可表示“阻止”(某计划或意图)、“防止”(已有兆头的险事、恶事)、“制止”(某人做某事)等,强调做好预先的防备或准备,含有“阻止成功”的意味。
2. prevent主要用作及物动词,可接名词、代词或动名词作宾语,不接不定式作宾语。用作prevent宾语的动名词前常有物主代词或者名词,人称代词宾格表示其逻辑主体。prevent可用于被动结构。prevent偶尔也可用作不及物动词。
3. 表示“阻止做某事”,可用prevent sb/sb's v -ing,也可用prevent sb from v -ing,这几种用法在意义上没有明显的区别。

1. prevent指“阻止成功”，如果阻止了，但是没有成功，不可用prevent。如果说她阻止他去，实际上他的确没有去，可以说She prevented him from going.但是他不听劝，还是去的话，要说She tried to prevent him from going, but he still went；
2. prevent加宾语时，宾语后不可接不定式。

   She prevented him to go.
   该句是错误的表达。