1
spontaneously + verb
He spontaneously offered to help.
他自发地提供帮助。
自发地
先理解核心含义，再看它在真实句子里的用法。
自发地
in a spontaneous manner
He spontaneously offered to help.
他自发地提供帮助。
自发地；自然地；自愿地
In a spontaneous manner; naturally; voluntarily.
She spontaneously decided to take a trip to the beach.
她一时冲动决定去海滩旅行。
The audience spontaneously started clapping after the performance.
演出结束后，观众自发地开始鼓掌。
He spontaneously offered to help his neighbor with the groceries.
他自然而然地提出帮邻居搬杂货。
He spontaneously offered to help.
他自发地提供帮助。
The idea came to her spontaneously.
这个想法是自发地出现在她脑海中的。
用于句首，强调动作的自发性。
Spontaneously, the crowd began to sing.
自发地，人群开始唱歌。
Not this
He helped me spontaneous.
Use this
He helped me spontaneously.
修饰动词要用副词，spontaneous是形容词，应改为副词spontaneously。
Not this
The action was spontaneously.
Use this
The action was spontaneous.
系动词后需用形容词作表语，不能用副词。spontaneously是副词，应改为形容词spontaneous。
Focus on the distinctions below. Other candidates are kept compact until a reliable usage note is available.
自燃
The pile of oily rags spontaneously combusted in the heat.
那堆油布在高温下自燃了。
自发产生
The idea spontaneously generated during our discussion.
这个想法在我们的讨论中自发产生。
自发爆发
Laughter spontaneously erupted from the audience.
观众自发爆发出笑声。
一时冲动决定
She spontaneously decided to take a road trip.
她一时冲动决定自驾游。
我觉得我要自燃了！
Homer Simpson says this in 'The Simpsons' episode 'El Viaje Misterioso de Nuestro Jomer' after eating a violent chili pepper.
霍默·辛普森在《辛普森一家》的《我们的霍默的神秘旅程》一集中吃了辣椒后说了这句话。
Use spontaneously naturally, then get feedback on meaning, tone, grammar, and phrasing.
Revisit a common error or keep this word in your review list.
想象一个婴儿自发地笑，没有原因——那就是'spontaneously'（自发地）。
语域：neutral 常见场景：日常对话、正式写作 通常用于中性语境，既可用于日常对话也可用于正式写作，表示行为或事件自然发生，没有外力干预。
spontaneously, simultaneously, and instantaneously share the same stressed vowel /teɪ/ and following sounds /niəsli/, so they rhyme exactly. Words like courteously, dangerously, viciously, gorgeously are lookalikes with the same spelling ending but different stress, so they do not rhyme.
Dictionary facts from ECDICT, OCTANOVE, WIKTIONARY.