ed 在英语中作用？

ed在英语中表示动词的过去式或过去分词，过去式用于一般过去时里面，如He looked excited yesterday morning.过去分词用于现在完成时和过去完成时等完成时态里面，如My mother has taught English since she was twenty-three years old.还可用于构成被动语态。

He was heard to sing in her room yesterday.

匿名回答于2024-05-31 10:29:50