英语听力论坛's Archiver

x-ace 发表于 2009-12-25 12:58

be to和be going to

   be to 表示客观安排或受人指示而做某事。
   be going to 表示主观的打算或计划。
 I am to play football tomorrow afternoon.   (客观安排)
 I'm going to play football tomorrow afternoon. (主观安排)

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