什麼情况下人称才接am are is was were皒不是问什麼人称接Be的助动词,,皒寔问什麼情况下人称才接BE的助动词啊

什麼情况下人称才接am are is was were
皒不是问什麼人称接Be的助动词,,皒寔问什麼情况下人称才接BE的助动词啊

I 接am(一般现在时),过去时用was.
You 和第三人称复数及名词复数接are(一般现在时),过去时用were.
第三人称单数及名词单数(he,she it)接is(一般现在时),过去时用was.