need to be done的问题主语（人） need/want/require to do 主语（物） need/want/require doning那need to be done前面是人还是物啊?

need to be done的问题主语（人） need/want/require to do 主语（物） need/want/require doning那need to be done前面是人还是物啊? sth need to be done的意思 need+to be done和need +doing的区别 sth作主语时need+ving 表示被动==need to be done 给我几个地道点的而且肯定正确的例句 need to be done 造两个句子 need to be done否定形式 need to be done 中的done 表示什么 need doing need to be done 还有没有单词有类似的用法 主动表被动的词除了need doing=need to be done还有什么词 need to do、need do、need doing、neeed to be done的区别need to do sth need do sth need doing sth neeed to be done 有什么区别, need doing ,need to be done,need to do 三者的区别?讲的要详细点. 有没must to be done这种用法的?如果没,那为什么有need to be done? need doing 和 need to be done有什么区别? remain to be done是否等于remain doing?need doing是否等于need to be done? sth request to be done=sth request doing有这样的主动表被动吗?类似于need to be done=need doing Being exposed to the sun for too long is bad for our skin.主语问题为什么主语要用being done的形式却不能省略be?什么成分可以省略be?什么时候不能省略? have something done和need to be done如题 请问have to be done ,need to be done怎么使用?是什么时态?表示什么时间段? need的实意动词和情态动词的用法区分（后加物）need 作为情态动词,后接动词原形,一般用在疑问句和否定句中作为实义动词,人作主语时后接to do ； 物作主语时后接doing 或 to be done It's cold ,you