deduce

/dɪˈdjuːs/ (bre, ipa) · /dɪˈduːs/ (ame, ipa) · /di-ˈdüs dē-; chiefly British -ˈdyüs/ (ame, mw)

deduce — verb

  • deducepresent simple I / you / we / they
  • deduceshe / she / it
  • deducedpast simple
  • deducing-ing form

1. to use the facts or evidence you have to figure out what must be true or what pr

1.動詞及物B2
釋義

to use the facts or evidence you have to figure out what must be true or what probably happened

例句

From the footprints on the floor, Tunde deduced that Nellie had entered through the back door.

deduce from [evidence] + that-clause

A geologist studied the rock samples and deduced the age of the ancient volcano.

deduce + noun phrase object

同義詞
  • infer

    broader meaning — includes understanding from context or implication, not necessarily by deliberate step-by-step reasoning

  • conclude

    focuses on the endpoint or decision reached, which may come from intuition or discussion rather than logical evidence

  • reason

    highlights the mental process of thinking logically rather than the conclusion itself

  • work out

    informal equivalent; common in everyday speech

文法句型

deduce + that-clause

deduce + wh-clause (what/where/when/why/how)

deduce + noun phrase + from + noun phrase

用法筆記

Commonly followed by a that-clause, a wh-clause (what, where, why, how), or a noun phrase. The source of evidence is introduced by from: deduce from [evidence] that…

常見錯誤

❌From the evidence, I deduce he is lying.
✅From the evidence, I deduce that he is lying.
💡The conjunction 'that' is standard after 'deduce' in formal writing, though it can be omitted in casual speech.
❌I deduced that she was tired from her yawning.
✅I deduced from her yawning that she was tired.
💡The 'from' phrase more naturally comes right after the verb, or at the beginning of the sentence.