is是啥意思

is的词典解释

vi.

1.(用于第三人称单数现在时)是

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。

助词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 isknown 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?