is的词性是什么?用英文表示!

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.be动词..
isvi.1.(用于第三人称单数现在时)是[L]
The picture on the wall is beautiful.
墙上的画很美.
Mr.Smith is a very good English teacher.
史密斯先生是个很好的英语教师.
v.aux.
1.(与v-ing连用构成现在进行时;与v-ed连用构成被动语态)
Mr.Ward is known as a great painter.
沃德先生是一位遐迩闻名的大画家.
What is she doing over there?
她在那儿做什么?
======以下答案可供参考======
供参考答案1:
verb