第1个回答 2011-01-05
be going to do:打算,计划,准备(往往经过事先考虑,甚至做了某种准备)或有某种预兆,、征兆,很有可能发生的事。
Mr. Wang is going to buy a car.
Dark clouds are gathering,it is going to rain.
shall/will: 并未事先考虑过,及说话时临时做出的决定。
If it is fine,we'll go fishing.
be to do :安排好要发生的事。
The meeting is to be held at 3 o'clock this afternoon.