In the sentence ALthough book was more than 50 years old it still contained helpful information word Although is a verb preposition an adjective or conjuction?

Here's why:

* Conjunctions connect words, phrases, or clauses. In this case, "Although" connects the clause "the book was more than 50 years old" with the clause "it still contained helpful information."

* Verbs show action or a state of being.

* Prepositions show the relationship between a noun or pronoun and another word in the sentence.

* Adjectives describe nouns or pronouns.

Let me know if you have any other questions!