分规则变化和不规则变化.
一般在动词后面加ed,以e结尾的单词只需加d
如 ask-asked ,call-called ,threaten- threatened,
live - lived ,resume- resumed
不规则变化比较复杂,需要靠长时间积累、感觉、记忆
但也有一定规律可循.
tell - told
think -thought
say - said
freeze - frozen
分规则变化和不规则变化.
一般在动词后面加ed,以e结尾的单词只需加d
如 ask-asked ,call-called ,threaten- threatened,
live - lived ,resume- resumed
不规则变化比较复杂,需要靠长时间积累、感觉、记忆
但也有一定规律可循.
tell - told
think -thought
say - said
freeze - frozen