Be cautious of
公共 Public留心..., 谨防...
🧩 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
No, not yet. What about you?
不， 还没有。你呢？
I'm afraid you have the wrong number.
恐怕你打错号码了。
Don't you remember?I had to water it every day.
你记得了吗？我不得不每天浇水。