be heard doing /do 有具体时间用doing?

be heard to do be be heard to be doing be heard doing be hea be heard to do sth 还是 be heard doing sth? 有没有be heard doing的说法 1.be heard to do与be heard doing的区别 用 be doing 和be doing to do 造句 三个 be terrified of doing sth 和be terrified to do sth 有什么区别?具体点 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 saw、heard sb______(do/doing) sth heard +doing和do的区别使用 有没有be bored doing,be bored to do,be bored in doing,be bored be doing与be going to do有什么区别? be going to,be doing,will do有什么区别