Adverbs can describe an action or modify adjectives or other adverbs. They can be one word or a phrase.
A phrasal verb is a phrase that consists of a verb with a preposition or adverb or both, the meaning of which is different from the meaning of its separate parts.
Obligation and necessity
- We use have to to talk about all kinds of obligation. It can be used in all tenses
Although is a conjunction and means "aunque".
Though can be a conjunction and an adverb. As a conjunction it is interchangeable with although with the same meaning.