a
gb/ə/ us/ə/
A1
英語
~ 100
語義
0件の語義
article
A1
relation
1
Indefinite article for singular nouns
Used before one thing when it is not known or not important which one.
用法パターン：
a [singular noun]
よくある間違い：
Learners sometimes use 'a' with plural or uncountable nouns, which is incorrect (e.g., 'a informations').
類義語
one (Used for emphasis on quantity rather than introducing a noun.)
対義語
the (Refers to a specific person or thing already known to the listener.)
コロケーション
a book
|a car
|a friend
|a problem
|a day
テーマ
grammar
|language_learning
|communication
|education
|core_vocabulary
例文
- I saw a cat in the garden.
- She bought a new phone yesterday.
- We need a plan for the weekend.
- He wants to be a doctor.
- There's a chance of rain tomorrow.
学習者向け例文
- I have a pen.
- She is reading a book.
- He lives in a big house.
- We saw a dog in the park.
- I want a sandwich.
名詞
A1
entity
2
First letter of the alphabet
The first letter in the English alphabet.
類義語
alpha (Used in some contexts to mean the first or most important, from Greek alphabet.)
対義語
Z (The last letter of the English alphabet.)
コロケーション
capital A
|lowercase a
|letter A
テーマ
language_learning
|writing
|communication
|education
|core_vocabulary
例文
- 'Apple' starts with an A.
- She wrote a perfect capital A.
- In the grading system, an A is excellent.
- The teacher drew an A on the board.
学習者向け例文
- A is the first letter.
- B comes after A.
- I can write the letter A.
- This word starts with A.
名詞
A2
entity
3
Highest academic grade
The best grade you can get in school or university work.
よくある間違い：
Learners may confuse 'A' as a grade with 'a' as an article in writing without context clues.
類義語
excellent (Describes quality but is not a grade symbol.)
対義語
F (Represents failure in grading systems.)
コロケーション
get an A
|straight A student
|earn an A
テーマ
education
|core_vocabulary
例文
- She got an A in mathematics.
- He's a straight A student.
- I worked hard and earned an A on my paper.
学習者向け例文
- I got an A in English.
- She always gets A's in her tests.
- He is a straight A student.
文法
表現
a bit of
1/ə bˈɪt əv/
fixed phrase
Small amount of uncountable thing
A small amount of something you cannot count.
例文
- I need a bit of sugar for my tea.
- There’s still a bit of hope left.
a couple of
1/ə kˈʌpəl əv/
fixed phrase
Two or small number of things
Two or a small number of things.
例文
- We stayed there for a couple of days.
- We stayed there for a couple of nights.
- I have a couple of questions for you.
- Can you give me a couple of minutes?
a few
1/ə fjˈu/
fixed phrase
Small number of items or people
A small number of things or people.
例文
- I have a few friends in this city.
- Can you give me a few minutes?
a few
2/ə fjˈu/
fixed phrase
A small number of something
Some, but not many, people or things.
例文
- I have a few ideas for the party.
- We met a few old friends at the café.
a lot of
1/ə lˈɑt əv/
fixed phrase
Large amount or number of something
Many or much of something.
例文
- There are a lot of people here today.
- We have a lot of work to do today.
- She has a lot of homework to do.
- She drinks a lot of tea every morning.