doubtless

doubtless — adverb

1. used to show that you believe strongly that something is definitely true or will

1.副詞B2
釋義

used to show that you believe strongly that something is definitely true or will definitely happen

例句

Iker will doubtless be pleased to hear that the board accepted his proposal.

sentence adverb before main verb (will + be pleased)

The new trade rules will doubtless increase costs for small family farms in the region.

同義詞
  • undoubtedly

    very similar in meaning and formality, slightly more common in everyday use

  • certainly

    broader range of use, less formal, also works as an intensifier

  • unquestionably

    stronger emphasis, often used in argument or debate

  • without doubt

    more emphatic phrasing, common in spoken English

反義詞
  • possibly

    expresses uncertainty rather than certainty

  • perhaps

    indicates a weaker likelihood, not certainty

文法句型

doubtless + will/have/be + complement

Doubtless + clause

用法筆記

Typically used as a sentence adverb, 'doubtless' modifies an entire clause rather than a single verb. It appears most often in formal and written English and is less common in casual conversation. Unlike 'probably', it expresses strong certainty, not likelihood.

常見錯誤

❌She will doubtlessly win the competition.
✅She will doubtless win the competition.
💡'doubtless' is already an adverb; 'doubtlessly' is nonstandard and rarely used by native speakers.
❌I will doubtless come to the party.' (when you mean 'maybe/probably').
✅I will doubtless come to the party.' (if you mean you are certain)
💡'doubtless' expresses certainty, not probability; use 'probably' for a weaker claim.