1
speculate about/on/upon sth
常用于对未知原因或结果的推测。
Journalists are speculating about the reasons for his resignation.
记者们正在猜测他辞职的原因。
猜测；推测
先理解核心含义，再看它在真实句子里的用法。
猜测；推测
to make a guess based on incomplete information
Journalists are speculating about the reasons for his resignation.
记者们正在猜测他辞职的原因。
根据不确凿的证据进行推断；猜测或推测。
To make an inference based on inconclusive evidence; to surmise or conjecture.
进行冒险交易以期望获利；投机或赌博。
To make a risky trade in the hope of making a profit; to venture or gamble.
预判将选择哪条代码分支并提前执行。
To anticipate which branch of code will be chosen and execute it in advance.
speculate
Base
原形
speculates
3rd person
第三人称单数
speculating
-ing
现在分词
speculated
Past
过去式
speculated
Past participle
过去分词
He often speculates about the future of technology.
他经常推测技术的未来。
They are speculating on the stock market these days.
他们这些天在股市投机。
She speculated that the meeting had been cancelled.
她猜测会议已经被取消了。
规则动词，过去式和过去分词加-ed。
People like to speculate about the reasons for the sudden change.
人们喜欢猜测突然变化的原因。
The journalist speculated that the company might announce a merger soon.
记者推测这家公司可能很快宣布合并。
Without more facts, we can only speculate what happened.
没有更多事实，我们只能推测发生了什么。
常用于对未知原因或结果的推测。
Journalists are speculating about the reasons for his resignation.
记者们正在猜测他辞职的原因。
后接that引导的宾语从句。
Some analysts speculate that the company will merge with a competitor.
一些分析师推测该公司将与竞争对手合并。
指商业投机，尤指风险投资。
He made a fortune by speculating in real estate.
他通过投机房地产发了财。
as to后接疑问词引导的从句，较正式。
They speculated as to whether the project would be completed on time.
他们猜测项目能否按时完成。
Not this
I speculate the reason for his absence.
Use this
I speculate about the reason for his absence.
动词‘speculate’作‘推测’讲时是不及物动词，不能直接跟宾语，需加介词‘about’或‘on’再接宾语。
Not this
She speculated to invest in that company.
Use this
She speculated about investing in that company.
‘speculate’表示‘投机’时，后面不能接不定式‘to do’，而应接介词‘about’或‘on’后跟动名词。
Focus on the distinctions below. Other candidates are kept compact until a reliable usage note is available.
推测，猜测
The media speculated about the reasons for his resignation.
媒体猜测他辞职的原因。
投机，推测
He made a fortune by speculating on the stock market.
他通过股票投机发了财。
猜测...
Some analysts speculate that the company will merge.
一些分析师猜测该公司将会合并。
胡乱猜测
Without evidence, people began to speculate wildly.
在没有证据的情况下人们开始胡乱猜测。
无休止地猜测
They would speculate endlessly about the outcome.
他们会无休止地猜测结果。
投机（某种商品或股票）
Many investors speculate in real estate.
许多投资者投机房地产。
Use speculate naturally, then get feedback on meaning, tone, grammar, and phrasing.
Revisit a common error or keep this word in your review list.
联想：'spec'像‘spectacle’（看），做投机或猜测时需‘看’清形势。
多用于推测或投机语境，中性偏正式；常见于学术讨论、日常推理、金融投资等场景。
常接介词 about 或 on 引出推测的内容，或接 that 从句。
Dictionary facts from ECDICT, OCTANOVE, WIKTIONARY, WORDNET.