need to be done否定形式
need to be done
need to be done.是什么意思?
need doing 和need to be done
need to be done 造两个句子
sth need to be done的意思
need to be done的问题
have something done和need to be done
need to be done 中的done 表示什么
need doing 和 need to be done有什么区别?
need+to be done和need +doing的区别
need doing 和need to be done 的区别
be needed to do与need to be done