Be to
准备,将要,预订;应该,必须,能够
🧩 词语组成解析
be
[bi]
v. 是;有，存在;做，成为;发生;
aux. 用来表示某人或某物即主语本身，用来表示某人或某物属于某一群体或有某种性质;
to
[tu,tə]
prep. 向，朝着;到;关于;属于;
adv. 朝一个方向的;到某种状态;关闭;
🗣️ 情景例句
She's worked two jobs for years.
几年来他一直同时做两个工作。
I couldn't keep the appointment because I was sick.
我不能赴约因为我病了。
After a long period of rain the river may overflow its banks.
久雨这后，河水会泛滥成灾，