Be uncertain of
不肯定..., 不确定...
🧩 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;
of
[əv]
prep. 关于;属于…的;由…制成;
aux. 助动词 [非标准用语、方言] =have [主用于虚拟语气];
🗣️ 情景例句
The checkout counters are very busy.
收款台都很忙。
There were times of disappointment, anger, and humiliation, and there were also times of joy.
生活中有失望、生气和屈辱的时候。
I work in a middle school near here. I'm a teacher.
我在附近的一个中学教学。我是个教师。