Jump!

• You are to do your homework without watching any TV.    
• The students are not to travel by subway without a friend.
• [Patient speaking to nurse] The doctor says that I’m to make an appointment to come back next month.

在下列三個 “be + to + verb” 的句子中，代表著計畫或已排定的事件 
 

• The plane is to take off at 9pm.
• The new kitchen cabinets are to arrive before December 20th.
• Their house is to be sold right away.

再次強調，這是一個正式的用法，當然我們也可以用 “be + going + to + verb” 代替 “be + to + verb" . 這並不會改變句子的意思。但比較起來， “be + going + to + verb” 會是一個比較非正式的用法。

• The plane is going to take off at 9am.
• The new kitchen cabinets are going to arrive before December 20th.
• Their house is to going to be sold right away.

參考資料 Ａ