a
🇺🇸
/ə/
🇬🇧
/ə/
determiner
A1
used before a noun to talk about one person or thing not mentioned before
I need a pen to write a letter.
我需要一支笔来写一封信。
A1
used to show someone is part of a group or has a job
He is a doctor at a hospital.
他是一家医院的医生。
A1
any or every one of something
A cat has a tail and a good sense of balance.
猫有尾巴和良好的平衡感。
B1
used before a feeling or idea word that has a describing word
She felt a deep sadness after a loss.
在一次损失后，她感到深深的悲伤。
R
used before two things that go together
Please bring a plate and a cup for the party.
请为聚会带一个盘子和一个杯子。
R
used instead of 'one' before some numbers
About a hundred people came to a meeting.
大约一百人参加了一个会议。
R
used when talking about how much things cost or how many
Apples cost two dollars a pound at a market.
在一个市场上，苹果每磅两美元。
R
a person who is like someone else
My brother is a real Einstein when it comes to a puzzle.
当涉及到谜题时，我哥哥真是个爱因斯坦。
R
used before a name to show you don't know the person
There is a Mr. Smith waiting to see you in a room.
有一位史密斯先生在一个房间里等着见您。
R
used before a day to talk about one specific day
We always have a meeting on a Monday at a set time.
我们总是在某个星期一的固定时间开会。
translation
一个, 一员, 任一, 一种, 一对, 一, 每, 类似, 某位, 某个