有没有be heard doing的说法看一个例句：he is heard to sing now./he was heard to sing just now 这里为什么用sing,我想都是短暂的动作不应该用singsing吗?

有没有be heard doing? 有没有be heard doing的说法看一个例句：he is heard to sing now./he was heard to sing just now 这里为什么用sing,我想都是短暂的动作不应该用singsing吗? be heard to do be be heard to be doing be heard doing be heard to doing我知道前两个是对的,后两个存在吗?若存在四个进行比较,有何区别be heard to dobe heard to be doing be heard doing be heard to doing如果不存在，前两 请问be heard to do/do/doing之间的区别以及是否存在be heard do 的说法 be eager to doing有没有这种说法 be surely doing有没有这种说法啊? be heard doing /do 有具体时间用doing? 有没有be not weak in doing sth的说法?be not well in可以这么用吗? 有没有be fun with,be fun to do和be fun doing这些说法? 有没有be bored doing,be bored to do,be bored in doing,be bored in to do?请问有没有这些说法 有没有persuade sb from doing sth的说法呢? 有没有make a decision of doing sth.的说法? 关于be seen doing 和 be seen to do有 see sb doing 和 see sb to do,那么相应的,被动要还原to,是不是就改成sb be seen to doing 和 sb be seen to do?但好像没有sb be seen to doing 这种说法,只有sb be seen doing. 有没有 want doing 这种说法? doing shop有没有这种说法 be heard to do sth 还是 be heard doing sth? be able to 的短语有be able to doing 的说法吧 有没有sb.be succeeded in doing sth.的词组?