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.
- Eat slowly before you choke again. (Conjunction)
- We went to bed before the fire broke out. (Preposition)
- Your dog and mine had a big fight twice before. (Adverb)
- He fell into a river, but a passerby rescued him. (Conjunction)
- She was a brilliant student but talkative. (Preposition)
- Colourful and fragrant flowers were on sale that included roses, tulips, and carnations, to name but a few. (Adverb)
- We must sleep now as we have to get up before sunrise. (Conjunction)
- This is a photo of him as a prisoner. (Preposition)
- His new puppy is as black as charcoal. (Adverb)
Conjunction can be another part of speech.
- 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 neighbour and so does her husband. (Adverb)
- The rumour was about an attempt to kidnap the President, but that was not so. (Adjective)