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
He prays every night before sleep.
他每晚睡觉着都祈祷。
Never say of another what you would not have him hear.
莫说不想让人听见的话。
Our clavichord is kept in the living room.
我们的这架古钢琴存放在起居室里。