feel sorry for sb 加什么?to do还是doing?

glad sb后面加什么?to do,doing,还是do? be difificult for sb do 还是doing还是to do thanks for后加什么?doing还是to do for sb是doing 还是to do.thank for是doing还是to do be good for ＋sth/sb 再加什么?to do?doing?还是do? feel sb to do/doing 区别 i am sorry后动词加to do还是doing feel like 后面加to do 还是 doing feel sb do/doing什么意思 wait for sb to do sth还是 doing sth get sb down后面加doing还是to do? warn sb.后是加 to do 还是加 doing 又有什么区别吗