A phrasal verb is a verb that is combined with a preposition (e.g. in, on, with) or an adverbial particle (e.g. up, out, off) The preposition or adverbial particle extend the meaning of the verb to ...
In addition, some of these verbs need an object, usually a person or people. The police warned us not to enter the building. The speaker invited the audience to ask questions. The best way to learn ...