1
react to sth
后接名词或代词，表示对某事物的反应。
She reacted to the news calmly.
她冷静地对待这条消息。
反应；回应
reacts — third person singular of react
先理解核心含义，再看它在真实句子里的用法。
反应；回应
respond
She reacted to the news calmly.
她冷静地对待这条消息。
常与to连用
作出反应。
To act in response.
产生反作用力；以相反力抵抗另一物体。
To return an impulse or impression; to resist the action of another body by an opposite force
相互反应；如化学试剂间产生交互或反向作用。
To act upon each other; to exercise a reciprocal or a reverse effect, as two or more chemical agents; to act in opposition.
使化学试剂发生反应；使一种试剂与另一种反应。
To cause chemical agents to react; to cause one chemical agent to react with another.
react
Base
原形
reacts
3rd person
第三人称单数
reacting
-ing
现在分词
reacted
Past
过去式
reacted
Past participle
过去分词
People often react differently to stress.
人们对压力的反应常常不同。
She reacted quickly to the emergency.
她对紧急情况反应迅速。
The chemicals are reacting in the flask.
这些化学品正在烧瓶中发生反应。
规则动词，过去式和过去分词加-ed。
She reacted calmly to the surprising news.
她对那个惊人的消息反应得很平静。
How did the children react when they saw the puppy?
孩子们看到小狗时有什么反应？
The teacher waited to see how the class would react to the new rule.
老师等着看全班对新规定会作何反应。
后接名词或代词，表示对某事物的反应。
She reacted to the news calmly.
她冷静地对待这条消息。
表示反对或抵抗某事物。
Many teenagers react against their parents' rules.
许多青少年反抗父母的规矩。
常用于化学语境。
Acids react with metals to produce hydrogen.
酸与金属反应生成氢气。
Not this
He didn't react on my question.
Use this
He didn't react to my question.
汉语学习者常将“react”误搭配介词“on”，而英语中“react”后应接“to”表示对某事的反应。
Not this
She reacted the news calmly.
Use this
She reacted to the news calmly.
汉语学习者常误将“react”用作及物动词，直接接宾语，但英语中“react”是不及物动词，须加介词“to”才能接宾语。
Focus on the distinctions below. Other candidates are kept compact until a reliable usage note is available.
对...作出反应
She reacted to the news with surprise.
她对这条消息感到惊讶。
与...发生反应
Sodium reacts with water.
钠与水发生反应。
反对；反抗
The public reacted against the new law.
公众反对这项新法律。
以...方式作出反应
He reacted by leaving the room.
他的反应是离开了房间。
作出积极反应
The patient reacted positively to the treatment.
患者对治疗反应积极。
迅速反应
We must react quickly to the crisis.
我们必须对危机迅速做出反应。
Use reacts naturally, then get feedback on meaning, tone, grammar, and phrasing.
Revisit a common error or keep this word in your review list.
用're（再）'和'act（行动）'组合记忆：再次行动就是反应。
该义项指‘起反应’（对刺激或情况做出回应），常用于日常交流、科学实验以及心理、化学等领域，语域中性，既可用于正式也可用于非正式语境。
通常不及物，后接介词to/against/with。
Dictionary facts from ECDICT, WIKTIONARY.