1 动词加ing形式,作为动词不能单独出现要加be动词,或者是 have / has been doing : ------ She is coming by taxi -------- She has been coming to see us for years. 2 作为形容词可以单独出现 ------- His story is qiute moving / touching / tear-inviting. 3 动词加ed形式,作为动词表示被动不可以单独出现,必须是 be + 过去分词: He was invited here (被动语态).We invited him here (主动语态). 4 也可以做为形容词单独出现: The ball game was exciting ,and he was excited about it .
动词加ed表示形容词的时候,就是做表语、作定语、做状语、作宾补的时候,相当于形容词使用。 例如:The book is well written. 表语 The fallen leaves 定语 I will get the chair repaired. 宾补 They came in, very excited. 状语