初中英语老师说人加finish doing，物加be over，可是我还是看到过物加be finished，这个到底可不

They were finished finish是动词,为什么还要加be动词? be finished doing这个问题 finish变延续性动词是什么?是finished还是be over 为什么我们英语书上写的是we have finis finish加to do 还是doing ‘must be’后加什么 加doing used to和be use to 加do还是doing be accustomed to后面加do sth.还是doing sth? be used to后面加do还是doing be in charge of后面加do还是doing? against 加doing 还是to do ,against 前要加 be be different from后加to do 还是doing 英语语法里如何区别be adj后面加doing还是to do?比如 be worth doing