Yes, you've noticed that phrasal verbs can change meaning if the context changes. It's worth noting how each different subject, object, preposition or situation can change the phrasal verb's meaning.
Please pay attention to verb conjugation! For example, the last sentence should be either "He picks up his backpack and makes for the bus," or "He picked up his backpack and made for the bus."
You're on the right track, but other errors in your sentences are preventing them from being correct.