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。
