1
suddenly at the beginning of a sentence
句首使用时，通常后接逗号，表示事件出乎意料。
Suddenly, the lights went out.
突然，灯灭了。
突然；忽然
先理解核心含义，再看它在真实句子里的用法。
突然；忽然
Quickly and unexpectedly, with little or no warning.
Suddenly, the lights went out.
突然，灯灭了。
迅速且几乎无预警地发生；突然地。
Happening quickly and with little or no warning; in a sudden manner.
意外发生的
happening unexpectedly
迅速且无预警地
quickly and without warning
冲动地；未经深思熟虑地
on impulse; without premeditation
He suddenly stopped talking and looked out the window.
他突然停下来不说话了，望向窗外。
AI contextual example
Suddenly, the power went out in the whole building.
突然，整栋楼的电都停了。
AI contextual example
The car in front of us braked suddenly.
我们前面的那辆车突然急刹车。
AI contextual example
suddenly she felt a sharp pain in her side
突然,她感到身体一侧一阵剧痛。
WordNet
句首使用时，通常后接逗号，表示事件出乎意料。
Suddenly, the lights went out.
突然，灯灭了。
置于主语和动词之间，强调动作发生的突然性。
He suddenly stopped talking.
他突然停止说话。
位于句末时，修饰整个谓语，语气较弱。
She left suddenly.
她突然离开了。
Not this
It happened all the sudden.
Use this
It happened all of a sudden.
'all of a sudden' 是固定短语，表示突然地，其中 'sudden' 是名词，而不是 'suddenly'。使用 'all the sudden' 是不规范的错误用法。
Not this
The change was suddenly.
Use this
The change was sudden.
'suddenly' 是副词，不能直接跟在系动词后作表语；应改用形容词 'sudden' 来描述主语 'change' 的性质。
Focus on the distinctions below. Other candidates are kept compact until a reliable usage note is available.
突然出现
A car suddenly appeared from around the corner.
一辆车突然从拐角处出现。
突然停止
The music suddenly stopped in the middle of the song.
音乐在歌曲中间突然停止了。
突然意识到
I suddenly realized I had forgotten my keys.
我突然意识到我忘了带钥匙。
突然改变
The weather suddenly changed from sunny to stormy.
天气突然从晴天变成了暴风雨。
突然想起
She suddenly remembered her appointment at 3 PM.
她突然想起下午3点有个约会。
突然间，我不再是以前的那个我了。
When she left, suddenly I felt lost.
当她离开时，我突然感到迷茫。
突然间，生活对我有了新的意义。
Hearing that song again, suddenly I remembered my childhood.
再次听到那首歌，我突然想起了我的童年。
Use suddenly naturally, then get feedback on meaning, tone, grammar, and phrasing.
Revisit a common error or keep this word in your review list.
Suddenly 谐音'速登'，想象某人快速登上舞台，出人意料。
neutral, narrative, descriptions of unexpected events
常置于句首或主要动词之前
Dictionary facts from DICTIONARY_API_DEV, ECDICT, WIKTIONARY.