为什么Do you want to go swimming this afternoon?不能说成Do you want going swimming this

题目

为什么Do you want to go swimming this afternoon?不能说成Do you want going swimming this
接上面：afrernoon?不是有两种说法,want to do sth 和want doing

答案

want doing=want to be done 解释为需要被……
want doing相当于need doing (=need to be done),就不是想要的意思了