对于初学英语的人,最不习惯的就是英语中几乎句句都有“是”,且变化多样,一会儿用am,一会儿用is,一会又成了are。其实动词be在句中的形式是随着主语的人称和数的变化而变化的。在一般现在时的句子中,第一、三人称复数和第二人称单、复数作主语时,谓语动词要用are。第一人称单数 For beginners, the most unaccustomed to English is the fact that almost every sentence in English has a “Yes” and varies. When you use am for a while, and then for a while, it becomes an are. In fact, the form of the verb be in the sentence changes as the subject’s person and number change. In the present-day sentence, when the first or third person is called plural and the second person is singular or plural, the predicate verb must be “are”. First person singular