■在陳述句中表示說話者給對方的承諾、決心、警告、威脅等.如：
I shall write to you again at the end of the month.月底我再給你寫封信.
You shall have it back next week.下星期一定還你.
He shall stay in bed.他必須躺在床上.
■表示強(qiáng)制,用于法令、條約、規(guī)章中,意為“必須,應(yīng)該”.如：
Candidates shall remain in their seats until all the papers have been collected.試卷完全收回后,應(yīng)試人才能離開座位.
■在主語是第一、三人稱的疑問句中征求對方意見：要不要……?……好嗎?如：
Shall I turn on the lights?我開燈好嗎?
Shall he wait for you outside?要不要他在外面等你?
■表示不可避免的某事：一定
That day shall come.那一天總會(huì)來的.
■Shall在反義疑問句里的應(yīng)用
Let's 引導(dǎo)的反義疑問句,用shall we?
Let's go to the park,shall we?
除了Let's 以外,其他的祈使句的反義疑問句,用will you?