Learn English – why do we use ‘prepared’ in a sentence like this

grammargrammaticalitypast-tense

The sentence below says something that's yet to happen, but the word prepared is in the past tense. Any suggestions on what to read to understand this will highly be appreciated. Thank you.

Always be prepared for the unexpected

I also heard someone in a movie say: "She be presented on her birthday"

Best Answer

Although prepared can be a past tense conjugation of the verb prepare, it can also be made into an imperative (command) by putting "be" before it. This makes it a past participle as an adjective meaning

be ready for something that is likely to happen done or made beforehand

In this case, it's not being used as a past tense verb.

You can see this definition in various dictionaries: the Cambridge English Dictionary, the Oxford English Dictionary, even online ones like the free dictionary.