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.Definition source:Cambridge dictionary online.
break down ( verb and adverb) or break in (verb and preposition) are examples of phrasal verbs.
Some Phrasal verbs can be transitive because they can take a direct object:
Some of them are separable, that means that you can separate the verb and the preposition but you must separate them when using a pronoun:
They pulled the house down and built a new one or they pulled down the house and built a new one.
They put the meeting off or they put off the meeting.
I paid you back.
You can see the direct objects above in bold face letters.
Some Phrasal verbs are intransitive, because they can never take a direct object so you can never separate them.
They got up early.
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