2. 时间词: yesterday, one week ago / two days ago, last week / month / year / Sunday. 1. 表示: 过去一段时间内所发生的事情或 动作 动词过去式( 动词+ed) 动词 动词 +ed +ed 的变化规则 的变化规则 1) 直接加ed, 如:play-played 2) 以e 结尾的, 直接加d ，如： dance danced 3) 以“辅音字母+y” 结尾的, 改y 为i, 再加-ed ， 如：study-studied 4) 不规则变化： taketook seesaw readread do-did, get-got go-went, eat-ate, sing-sangdo see get read eat take sing go saw went took read ate sang did got play clean visit watch wash dance study played cleaned visited watched washed danced studied bough
