shall和will作为助动词可以与动词原形一起构成一般将来时。例如：
I shall study harder at English.
我将更加努力地学习英语。
He will go to Shanghai.
他要去上海。
I shall not come if it rains tomorrow.
如明天下雨我就不来。
My brother will leave for the United States next week.
我的哥哥下星期要到美国去。
在过去的语法中，语法学家说shall用于第一人称，will 只用于第二、第三人称。现在，尤其是在口语中，will也常用于第一人称。
关于“shall/will”的用法的五个规则：
① 说或写都尽量使用“I'll，You'll，He'll，She'll，It'll，We'll，They'll …”的简缩形。例如：
I'll answer your question.
You'll read my blog.
He'll point out my mistake.
She'll like my essays.
It'll be a hot night for me.
We'll go to bed.
They'll wake up here.
②要表达主语的“意志”，通常都用“will”(文法上称为意志将来)。
I won't see him again.
我不愿意再和他见面。
Who will go and help that poor old man?
谁愿意去帮助那个可怜的老人?
Mary will. (玛丽愿意。)
③说话者要把自己的“意志”表达或行使出去，通常用“shall”。
You shall not do that again.
，我们将会及时处理。
