英语be about to 的问题

Question

是加doing 还是to do 呢？

Answer 1

(1)be about to 做为词组，意为“将要(做)XX”后加动词原形do。相当于be going to do sth.
(2)be about doing sth，这个句子中的about为介词，如“My visit is all about making friends”
(3)对于你提出的be about to，应该是第一种用法，后直接加动词原形do。是个固定词组。

Answer 2

to do

Answer 3

be about to do是正确的