help；(to) take
let sb do
help sb (to) do麻烦解释下 别说一个句式。。。比如说是祈使句所以。。。我分析一下句子成分好了啦let her help the little boy take the bag to clean the room祈使句，省略了主语you，let作谓语，her 是宾语，help往后是let的宾语补足语宾补中又有宾语和宾补，the little boy 是help的宾语，take the bag是help的宾补to clean the room是不定式做目的状语