Tom and I are English(前面的括号不必填）.
we are from Beijing.
Tom is my good friend.
be动词的用法
be （be/is/are/am/was/were) [bi:] vi 现在时 I am, you are, he is, we are, you are, they are （缩略式 I'm, you're, he's, we're, you're, they're）, （否定缩略式 I'm not, isn't, aren't）, 过去时 I was, you were, he was, we were, you were, they were （过去时否定缩略式 wasn't, weren't）, 过去分词 been, 现在分词 being 英语的“be”是个特殊动词；有些语言,如马来文等,并没有“be”这样的动词. “Be”除了原形的“be”之外,还有另外七种形式：am, is, are, been, being, was, were