can
David can speak Chinese.
You can enter if you have a ticket.
Can you open the window?
Anybody can make mistakes.
Karen can’t be home now.
may
May I use your bathroom?
We may have some rain tomorrow.
must
I must attend the meeting.
You must not drink beer in the office.
She must be Bobby’s sister.
should
You should exercise every day.
My parents should be in Boston now.
will
Joe will be busy now.
I will do my best in my new job.
My grandfather will often go fishing on Sundays.
Will you close the window？
Shall
Shall I buy some milk？
伍玥西西
should本身是shall的过去式，所以它应该属于shall
伍玥西西
只不过好多英国人都会经常用can代替may
伍玥西西
can标示能力，may才表示可不可以
1398592ogds
很好的讲解
青山隐_01
表示请求和建议是用的吗