1.rained 2.snowed 3.boiled 4.enjoyed 1.they cleaned their shoes yesterday. 2.he opened the box last night. 不是在句子中过去式就不同,单词的过去式都是固定了的,你要背诵记忆下来. 主要有几种: 1.直接加ed,比如:listen, look, watch 2.有e结尾的,直接加d,比如:like等 3.元音加y结尾,直接加ed,比如: enjoy, play 4.辅音加y结尾,去y为i,加ed,比如:study等 5.双写最后一个字母加ed,比如:stop,drop等.
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