doing 原型是 do
doing 是进行时态,
I do,we do,he/she does
I am doing.we're doing,he/she is doing
例：
we do it because we like it,therefore we are doing it now.
doing的原形是什么单词?
doing 原型是 do
doing 是进行时态,
I do,we do,he/she does
I am doing.we're doing,he/she is doing
例：
we do it because we like it,therefore we are doing it now.