1. 一般将来时
1)表示将来时的四种形式
①will /shall +动词原形②be going to do ③be about to do ④be to do
辨析：will / be going to
① be going to 有很强的计划性，打算干什么，而will表示谈话时临时决定的意图，具有临时性和偶然性。
----The telephone is ringing. ----I _____ answer it.
A. will B. am going to C. am to D. am about to
