to do →to be done to be doing to have done →to have been don
to do →to be done to be doing to have done →to have been don
to do / to be doing / to have done / to have been doing/doin
歌曲中含有TO DO :TO BE DONE :TO HAVE BEEN DONE :TO HAVE DONE
have been done 和 to be done
to be done to have been done to have been doing 形式的造句,
have done/to be done
怎么区分谓语动词,to do doing done 和to be doing to be done to have do
have it to be done
to have done,to be done,to have been done,having done在用法上有什么
seem to be doing sth ,seem to do ,seem to have done sth
be supposed to be done 和be supposed to have been done的区别
Be said to do和be said to be doing和be said to have done有什么区别