The Open Dictionary

A, a

名詞

UK/eɪ/
US/eɪ/

定義 A, a 名詞

letter

  1. CountableUncountable

    The first letter in the English alphabet.

music

  1. CountableUncountable

    A specific note in Western musical scales.

    • This piece of music is written in A major.

    • The band started their performance with an A note.

    • Her voice sounded bright and clear when she hit the high A.

grade

  1. CountableUncountable

    A grade indicating excellent performance in academic work.

    • She received an A on her math exam.

    • All of his assignments earned an A.

    • The professor gave her an A for the essay.

限定詞

UK/eɪ/
US/eɪ/

定義 A, a 限定詞

general

  1. A1

    Used before a noun to indicate a single, non-specific item or person.

    • I need a new chair.

    • She saw a bird flying past the window.

    • He bumped into a friend of his.

  2. A1

    Used to specify the type or category of a person or thing.

    • He is a well-known author.

    • This is a very fast car.

    • She wants to be a successful entrepreneur.

  3. A1

    Used to refer to any single item or person within a given category.

    • A cat is usually very independent.

    • A good manager needs to have leadership skills.

    • A bicycle is a great way to exercise.

  4. Used before certain uncountable nouns to limit or specify their meaning.

    • She has a broad knowledge of the subject.

    • There was a strange calmness in the office.

    • The community needs more support.

  5. A2

    Used before certain action nouns to refer to a single instance of the action.

    • I'm going to take a nap.

    • I need to take a break.

    • She decided to go for a walk.

  6. A2

    Used when referring to a portion or serving of something, especially food or drink.

    • Can I have a tea, please?

    • He ordered a pizza.

    • I drink a glass of juice every morning.

  8. A2

    Used before the first of two nouns that are regarded as a single unit.

    • a knife and fork

    • a table and chairs

    • a pen and paper

  9. A2

    Used before certain words expressing quantity.

    • a bit of water

    • a number of books

    • a large amount of money

  10. Used before a person's name to refer to someone unknown.

    • A Mr. Lee called to speak with you.

    • A Miss Wang was here looking for you.

    • A doctor came by to check on him.

  11. Used before someone's family name when referring to a member of that family.

    • Is that a Smith over there?

    • She must be a Brown.

    • He might be a Lee.

  12. Used before a day or month to refer to one instance of it.

    • I will be taking a holiday in a July.

    • She will be arriving on a Saturday.

    • He will start a new job in a March.

number

  1. A1

    one

    • a million

    • a pair

    • a group of people

  2. A2

    Used between a fraction and a unit of measurement.

    • a quarter of a mile

    • two-fifths of a liter

    • three-tenths of a second

  3. A2

    Used to indicate the frequency of an event within a given time frame.

    • Take this medicine twice a day.

    • I visit her once a month.

    • I work out three times a week.

  4. A2

    Used to express earnings or expenses over a particular time.

    • He earns five thousand dollars a month.

    • The rent for this apartment is one thousand dollars a month.

    • The service costs one hundred dollars a day.

成語

  • from A to Z

    covering every detail or aspect; comprehensively.

    • This manual explains the entire process from A to Z.

  • from A to B

    Used to describe movement or transfer from one location to another.

    • This company is responsible for transporting goods from the factory to the warehouse.