Here are some examples of compound sentences using "beware" in different contexts:
* Beware of the dog, for it is fiercely protective. (This sentence uses a conjunction "for" to connect the two clauses.)
* The path ahead is treacherous, so beware of loose rocks. (This sentence uses a conjunction "so" to connect the two clauses.)
* The water is deep and cold, and beware of the strong currents. (This sentence uses a conjunction "and" to connect the two clauses.)
To create a compound sentence using "beware," you need to add a clause that describes what you should beware of.