do does怎能用,要例句

do does怎能用,要例句
do does怎能用,要例句

do does怎能用,要例句
do一般用于说自己或者超过一个人的情况
does用于说他 她 它
do和does 都用于现在
did适用于任何人但是必须是以前的事
I do not understand this question
They do not understand this question
We do not understand this question
我、我们、他们不明白这问题
I、she、he、we did not understand this question,but I understand it now 我以前不明这问题,但是现在明白了
he、she does not understand this question
他她 不明白这道问题

do主语第一人称，does主语第三人称，
I do the homework.
He does the homework.