4、cupisbroken起形容词、副词作用，表主动作表语、定语、状语、宾语补足语Iheardhimcrying.二、系动词：（一）Be动词：be是一个多功能动词，在初级英语里可见四种用法： 1、系动词be：be为连系动词，中心词义是"是"，句型为"主＋系＋表"结构。其变化形式主要如下：1）现在式：am, is, are2）过去式：was, were3）助动词/情态动词＋原形：will/can/may/must be4）助动词＋过去分词：have/has/had been。 To help animals is helping people.(一般现
5、在时) The twins were very busy yesterday.(一般过去时) It will be sunny tomorrow.(一般将来时) She has been ill for over a week.(现在完成时) 2、助动词be：助动词be，无词义，辅助主要动词一起在句中作谓语动词。其用法如下： 1）构成进行时态：be+doing。有现在和过去两种进行时态。如： The girls is reading and copying the new words now. Young Tom was always
6、asking questions and trying out new ideas. 2） 构成被动语态：be+done。(主语是动作的承受者，done必须是及物动词)。如： Tea is grown in my hometown.(一般现在时的被动语态) This building was built three years ago.(一般过去时的被动语态) Our classroom has been cleaned and tidied already.(现在完成时的被动语态) How could this kind of cakes
7、 be made in your home?(含情态动词的被动语态) That is a day never to be forgotten.(动词不定式的被动语态)3） 构成将来时：A.be+going to do表示"打算或将要做某事"，be有现在和过去两种形式： We are going to plant trees in the park. I didn’t know if she was going to come here. B. be+to do，表示"按计划安排将要做某事"。如： The new shop is not to
8、 be opened till next Monday. One night an angel came t
