用be eager to do sth.和be willing to do sth.造句

用be eager to do sth.和be willing to do sth.造句 be willing to do sth 是be eager to 还是 eager to do sth be willing to do sth difficult是什么意思? eager to do sth 用be afraid to do sth造句 用be able to do sth造句 用be used to do sth.造句 用be supposed to do sth造句 用be used to do sth 造句 用be early to do sth.造句 用Be.sorry.to.do.sth.造句.