21days consists of my winter vacation 是可以这么写的,但通常不这么表达,这样感觉怪怪的,我的寒假是由21天构成的?时间名词做主语时,无论单复数,谓语都应该用单数哦!切记~~~~~
There are 21 days in the winter vacation.
不可以
应该是:We have 21 Days for our Winter Holiday.
I have 21 days in my winter holiday.
I have 21 days in this winter holiday.
i am 21 days about my winter vacation
就行了,听懂足够了。