I think doing something for your parents is the best gift.此处为啥填do 的ing形式呀?
问题描述：
I think doing something for your parents is the best gift.此处为啥填do 的ing形式呀?
答
doing something for your parents 做名词,放在系动词is的前面,而
do something for your parents 是动词,不能放在系动词is的前面.
doing something for your parents isthe best gift
名词 系动词 名词
明白没?
PS 这个与I think没有关系,是个宾语从句,后面可以随意+个句子
句子意思就是
我认为为你的礼物做点事情就是最好的礼物.