is是什么词性

is词性及解释

vi.

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。

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?

is双语例句

Clearly there is a problem here

显然，这里出了个问题。

This is a common fallacy which has no basis in fact.

这是一个没有事实依据的常见谬误。

Choosing the right type of paint for the job is half the battle.

选对了涂料，这项工作就成功了一半。