谁知道To be,To do,To have
有谁知道be obliged to do
谁知道"TO BE IS TO DO."的意思?
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
be thankful to do / to have done 举个例子
be related to 与have something to do with
to do →to be done to be doing to have done →to have been don
to be is to do
英语教材中的 to be 、to do 、to mean、to have 等的 to 为什么在句中不出现 to
怎么区分谓语动词,to do doing done 和to be doing to be done to have do
be kept to do
be paid to do