1
a + singular countable noun
用于泛指单数可数名词。
I have a dog.
我有一只狗。
字母A
A+'s — plural of a
先理解核心含义，再看它在真实句子里的用法。
字母A
the first letter of the English alphabet
I have a dog.
我有一只狗。
Prepare the learner guide for this word
可生成：语法 Grammar。只有点击后才会开始生成。
A牌；王牌(包括在纸牌游戏中)
Ace. (including in card games)
拉丁字母 A/a 的名称。
The name of the Latin script letter A/a.
西里尔字母 А/а 的名称。
The name of the Cyrillic script letter А/а.
某些教育机构颁发的学业成绩等级,略优于A。
An academic grade issued by certain educational institutions. Slightly better than an A.
I saw a cat in the garden.
我在花园里看到一只猫。
She wants to buy a new car.
她想买一辆新车。
He is a teacher at the local school.
他是当地学校的一名教师。
用于泛指单数可数名词。
I have a dog.
我有一只狗。
She is a kind person.
她是一个善良的人。
表示数量或种类。
He drank a cup of coffee.
他喝了一杯咖啡。
Not this
I need pen.
Use this
I need a pen.
在英语中，单数可数名词前需要加不定冠词"a"表示泛指。汉语没有冠词，所以学习者容易遗漏。
Not this
I need a information.
Use this
I need information.
"information"是不可数名词，不能与"a"连用。汉语中“信息”可视为可数，导致误用。
Focus on the distinctions below. Other candidates are kept compact until a reliable usage note is available.
大写字母A
Write your name with a capital A.
用大写A写你的名字。
A型血
She has blood type A.
她是A型血。
A抗原
The A antigen is found on red blood cells.
A抗原存在于红细胞上。
从头到尾，完全地
She knows the subject from A to Z.
她对这门学科了如指掌。
一流的，顶级名单
The party was full of A-list celebrities.
派对上全是顶级名人。
最佳状态，最高水平
You need to bring your A-game to the competition.
你需要在比赛中发挥出最佳水平。
A代表苹果
A is for apple, so starts the alphabet song.
A代表苹果，字母歌就是这样开始的。
她胸前佩戴着一个猩红色的'A'字。
In The Scarlet Letter, Hester Prynne is forced to wear a scarlet 'A' as a symbol of adultery.
在《红字》中，海丝特·白兰被迫佩戴猩红色的'A'字作为通奸的象征。
Use A+'s naturally, then get feedback on meaning, tone, grammar, and phrasing.
Revisit a common error or keep this word in your review list.
字母A像金字塔，是字母表第一个，寓意第一和开始。
表示字母A，用于拼写、字母表等场合，语气中立。
All the listed words end in the /eɪ/ sound and rhyme with the noun 'a' (the letter name). Do not confuse with words ending in the letter 'a' but pronounced as /ə/ (e.g., umbrella, camera) or as /ɑː/ (e.g., spa, bra). Also, words like 'name' or 'make' have a consonant after the vowel and do not rhyme.
Dictionary facts from AI_FALLBACK, ECDICT, WIKTIONARY.