11.6 be to和be going to
?
   be to 表示客觀安排或受人指示而做某事。
   be going to 表示主觀的打算或計劃。
  I am to play football tomorrow afternoon.   (客觀安排)
  I'm going to play football tomorrow afternoon. (主觀安排)













 學習啦--英語語法大全