it be adi to do sth 用这个形式造句
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.
用be used to do sth造句
用be ready to do sth.造句
it is +adi of sb to sth 与 It is +adj for sb to do sth 的区别有哪些
形式主语 it should be avoided to do sth.
excited造句用be excited to do sth造句!还有pack sth.with sth.....be