1
verb + speculatively
此时 speculatively 表示“思考地、揣测地”，常紧跟在动词后。
He looked speculatively at her.
他若有所思地看着她。
思考地；思索地
先理解核心含义，再看它在真实句子里的用法。
思考地；思索地
in a thoughtful or reflective way
He looked speculatively at her.
他若有所思地看着她。
推测性地。
In a speculative manner.
She tilted her head and looked at the painting speculatively, as if weighing its value.
她歪着头，若有所思地看着那幅画，好像在估量它的价值。
He chewed his lip speculatively while considering the job offer.
他一边考虑着这份工作邀请，一边若有所思地咬着嘴唇。
The cat stared speculatively at the bird on the windowsill.
猫盯着窗台上的鸟，若有所思地。
此时 speculatively 表示“思考地、揣测地”，常紧跟在动词后。
He looked speculatively at her.
他若有所思地看着她。
表示“投机地”时，speculatively 可放在动词前，突出行为方式。
They speculatively invested in the new company.
他们投机地投资了这家新公司。
Not this
He looked at me speculative.
Use this
He looked at me speculatively.
look at 是实义动词，需用副词修饰动词；speculative 是形容词，只能修饰名词，不能修饰动词。
Not this
His theory sounds speculatively.
Use this
His theory sounds speculative.
sound 是系动词，后面要接形容词作表语；speculatively 是副词，不能作表语。
Focus on the distinctions below. Other candidates are kept compact until a reliable usage note is available.
若有所思地看
She looked speculatively at the letter in his hand.
她若有所思地看着他手中的信。
推测性地思考
Scientists think speculatively about the possibility of parallel universes.
科学家们推测性地思考平行宇宙存在的可能性。
以推测的方式撰写
The journalist wrote speculatively about the reasons for the resignation.
这位记者以推测的方式撰写了辞职原因的文章。
投机性地投资
He invested speculatively in foreign real estate.
他投机性地投资了外国房地产。
投机地购买
They bought the land speculatively before the highway was announced.
他们在公路宣布之前投机地购买这块土地。
从推测的角度说
Speculatively speaking, the weather should improve by Friday.
从推测的角度说，周五前天气应该会好转。
Use speculatively naturally, then get feedback on meaning, tone, grammar, and phrasing.
Revisit a common error or keep this word in your review list.
记住副词来自 speculate（推测/投机），像在脑中快速推算下一步动向。
语域：mixed 常见场景：学术/理论讨论、金融/商业语境 通常用于较正式的书面表达：在学术、理论讨论中多表示“推测地/思考地”，在金融、商业语境中多表示“投机地”。日常口语中较少单独使用。
speculatively 读 /ˈspekjələtɪvli/。以上都不是它的真正同韵词：relatively、negatively 虽然首音节重读且元音同为 /ɛ/，但重读元音后的辅音不同；creatively、alternatively 拼写也带 -atively，但重读和元音不一样（creatively 的 -atively 读 /eɪtɪvli/）；respectively、specifically 只是开头 spec- 的形近词，重音都在第二音节，不能按 speculatively 的读音类推。
Dictionary facts from ECDICT, WIKTIONARY.