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verb + uncertainly
修饰动作时通常放在动词之后，表示动作带着犹豫或缺乏把握。
He smiled uncertainly.
他没把握地笑了笑。
没把握地；犹豫地；不确定地
先理解核心含义，再看它在真实句子里的用法。
没把握地；犹豫地；不确定地
showing lack of certainty
He smiled uncertainly.
他没把握地笑了笑。
不确定地；迟疑地
In an uncertain manner.
She looked at the strange object uncertainly before touching it.
她不确定地看着那个奇怪的物体，然后才去碰它。
The witness answered uncertainly when the lawyer repeated the question.
当律师重复那个问题时，证人回答得犹犹豫豫。
He uncertainly stepped onto the icy path, testing each foot.
他犹豫不决地踏上结冰的小路，每一步都先试探一下。
修饰动作时通常放在动词之后，表示动作带着犹豫或缺乏把握。
He smiled uncertainly.
他没把握地笑了笑。
置于句首时用逗号与主句隔开，更强调动作中的犹豫或不确定。
Uncertainly, he raised his hand.
他犹豫地举起了手。
Not this
She looked at him uncertain.
Use this
She looked at him uncertainly.
修饰动词 look 应使用副词“uncertainly”，而“uncertain”是形容词，只能修饰名词或作表语，不能修饰动作。
Not this
He was uncertainly about the answer.
Use this
He was uncertain about the answer.
系动词 was 后应接形容词“uncertain”作表语，不能使用副词“uncertainly”；表示“对……不确定”时，后接介词 about。
Focus on the distinctions below. Other candidates are kept compact until a reliable usage note is available.
犹疑地微笑
She smiled uncertainly at the stranger.
她犹疑地对陌生人笑了笑。
犹疑地看着
He looked uncertainly at the door.
他犹疑地看着门。
迟疑地停下
She paused uncertainly before entering the room.
她在进房间前迟疑地停了下来。
没有把握地说
He spoke uncertainly about the plan.
他谈这个计划时没有把握。
没有把握地回答
"I think so," she answered uncertainly.
“我想是的，”她没有把握地回答。
迟疑地走
He walked uncertainly along the dark path.
他沿着黑暗的小路迟疑地走着。
Use uncertainly naturally, then get feedback on meaning, tone, grammar, and phrasing.
Revisit a common error or keep this word in your review list.
记忆联想：un(不)+certain(确定)+ly，被问住时只能uncertainly地笑，心里直打鼓。
语域：neutral 常见场景：日常对话、书面叙述 该词为中性副词，通常用于表达行为或话语中的犹豫、缺乏确定感；在日常对话和书面叙述中都比较常见。正式程度不高也不低，具体语气需结合上下文判断。
certainly 与 uncertainly 押韵（重读元音同为 /ɜːr/，后续音为 /tənli/）；mainly、plainly、vainly 仅拼写相似，读音为 /eɪnli/，与 uncertainly 不押韵。
Dictionary facts from ECDICT, WIKTIONARY.