【英语基础】Does的用法》》》

回答一:snows
回答二:不加s 不能用It's代替
因为这是表示客观事实和普遍真理、客观存在的,要用一般现在时
另外,一般现在时的用法：
1) 经常性或习惯性的动作,常与表示频度的时间状语连用.
时间状语：often, always, usually, sometimes ,every morning/night/evening/day/week ,twice a week ,never.
如：I read English every morning.
She sometimes goes shopping on Sundays.
2) 客观真理,客观存在,科学事实.如：The earth moves around the sun.
Shanghai lies in the east of China.
3) 表示格言或警句中.如：Pride goes before a fall. 骄者必败.
4) 现在时刻的状态、能力、性格、个性.如：I don't want so much.
He writes good English but does not speak well.
5）倒装句,表示动作正在进行,如：Here comes the bus. = The bus is coming.
There goes the bell. = The bell is ringing.
6) 一般现在时Be动词情况： am,is,are也可以做一般现在时的助动词
如：I am a student.