are的缩写形式是 they're ,具体使用规则如下:
基本缩写规则
主语为第二人称单复数 (you)或 复数名词/代词 (they)时,be动词用 are ,缩写为 they're 。
使用示例
肯定句 :
They are boys. → They're boys.
The weather is nice today. → It's nice today.
疑问句 :
Are they coming to the party? → They're coming.
否定句 :
The cake isn't delicious. → It's not delicious.
注意事项
缩写 只能用于be动词之后 ,且 必须紧跟be动词 ,例如:
正确:She is a doctor. → She's a doctor.
错误:She are a doctor.
单数主语 (如he/she/it)必须使用 is 的缩写 he's ,不可用 they're 。
通过以上规则,可以灵活运用 they're 简化复数主语的句子结构。