分类：教育/科学-外语学习-英语考试
问题：大家帮我做道英语题beabouttodo与betodo有何区别， 
be about to do与be to do有何区别，如何用？
回答：be about to do与be to do有何区别:
be about to即将，快要，正要，表式最近将来，后边一般不跟具体的时间状语； 

 be to do表计划＼将来＼打算＼义务＼职责等，后可跟时间状语；
I was about to go to bed when someone came to knock at the door.
I was to go to the station tomorrow to meet my uncle.