英语题目want doing 和want sth.done

题目

英语题目want doing 和want sth.done
I don't want any bad words _____ behind my back.
A.say B saying C.said D. to say
want doing =want to be done 那为什么是C而不是B呢?
want doing 和want sth.done 有什么区别呀

答案

want doing是 想做什么事情!
want sth.done 是 相让什么被.表示被动
本题里就是 想让不好的话被说