A conjunction can be a preposition, an adverb, or an adjective. It depends on its use in a sentence. Care is required to ensure its correct use when constructing a sentence.
- He couldn’t even sign his cheque, for he was completely drunk. (Conjunction)
- His grandchildren booked a coffin for him when he fell into a coma. (Preposition)
- Her husband had an affair with a colleague so his wife did the same with her boss. (Conjunction)
- She hates her nosy neighbor and so does her husband. (Adverb)
- Their book is about aliens out to kidnap the President, but that was not so. (Adjective)