to be doing ,to doing 与 to done 之间的区别?弄的稀里糊涂的,

来源:学生作业帮助网 编辑:作业帮 时间:2024/11/16 02:15:31
to be doing ,to doing 与 to done 之间的区别?弄的稀里糊涂的,
x)+WHJUHKWr ';T';_N|VӞ]O;V?<_gۚ\"}2 ka~ l^,kJ?k0WS!1WYQBAQjqj^IbIf~#OWh 4{8U}׳/.H̳́(]+=t,jT{^ '{@l}>e==:^ de"b

to be doing ,to doing 与 to done 之间的区别?弄的稀里糊涂的,
to be doing ,to doing 与 to done 之间的区别?
弄的稀里糊涂的,

to be doing ,to doing 与 to done 之间的区别?弄的稀里糊涂的,
to be doing 是将要的意思,I am to be doing a presentation.
to doing 中的to 只能是介词.
to done 是 to do 的过去式.

to do 动词不定式
to doing 这里的to作介词用,所以用doing的形式