ắt là

Anh ấy đã học rất chăm chỉ, ắt là anh ấy sẽ đỗ kỳ thi.

Definition

1. Adverb:
   • Certainly / Surely / Definitely: Used to express a high degree of certainty or conviction about a future event or logical conclusion. It indicates that the speaker believes something is inevitable or very likely to be true.
   • Must be / Undoubtedly: Functions as a modal adverb to assert a strong assumption or deduction.

Usage Examples

• Adverb:
  • Anh ấy học chăm chỉ như vậy, ắt là sẽ thi đỗ. (He studies so hard; he will certainly pass the exam.)
  • Trời mưa to thế này, ắt là đường sẽ ngập. (It's raining so heavily; the roads must be flooded.)
  • "Nó đỗ, ắt là anh vui lòng." ("He passed; you must undoubtedly be pleased.")

Advanced Usage

• "ắt": A more concise, literary form with the same meaning as "ắt là". It is often used in proverbs, formal writing, or older texts.
  • Có công mài sắt, có ngày nên kim. (With perseverance, a piece of iron can surely become a needle.)

Variants and Related Words

• Chắc chắn (adv): surely, certainly. A more common modern synonym.

  • Cô ấy chắc chắn sẽ đến. (She will surely come.)

• Hẳn là (adv): must be, probably. Expresses a strong probability, slightly less absolute than "ắt là".

  • Hẳn là cô ấy rất mệt. (She must be very tired.)

Synonyms

• Certainly: Used to emphasize that something is definitely true or will definitely happen.
• Surely: Used to express strong belief or expectation.
• Undoubtedly: Without doubt; certainly.
• Must be: Used to indicate a logical certainty or a very strong likelihood.

Related Idioms and Phrases

• Ắt hẳn: A reinforced form combining "ắt" and "hẳn", meaning "surely and certainly" or "without a doubt". It is used for strong emphasis.
  • Việc này ắt hẳn có nguyên nhân. (This matter surely has a reason.)