let的过去式过去分词答案是:let - let 动词过去式和过去分词的变化规则:规则变化1 一般在词尾加ed,如 open - opened - opened2 以E 结尾的词只加d, 如 close - closed - closed3 以辅音字母加Y结尾的词,把Y改为i 再加ed,如 carry- carried- carried4 以重读闭音节结尾且只有一个辅音字母,要双写辅音字母现加ed,如 stop - stopped - stopped不规则变化 要背不规变化表,把它们分为:AAA型,如 let - let - let ; cut - cut -cut ; AAB型,如 beat- beat - beaten; ABA型,如 become - became - become ; come - came -comeABC 型,如,speak- spoke - spoken , break - broke - brokenABB型,如 make - made - made ; build - built - built let 是不规则变化,属于AAA型,即它的过去式和过去分词都是 let