Doing morning exercises is ···?用is还是are?应该用is吧?还有Spending weekend is···对吧?因为这是件事情对吧?用is

问题描述:

Doing morning exercises is ···?
用is还是are?应该用is吧?
还有Spending weekend is···对吧?
因为这是件事情对吧?用is

is,Doing morning exercises是一件事情,is指的是这件事情,同样的,spending weekend是一种做法,当然也用is,理解了?