1) A phrasal verb is a verb combined with a particle that changes the meaning of the verb. Particles affect meaning while prepositions do not.
2) Transitive phrasal verbs take an object and can be separated or inseparable depending on the specific verb. Pronouns must go between the verb and particle.
3) Intransitive phrasal verbs do not take an object and are always inseparable. The document provides examples and guidelines for identifying and using separable and inseparable phrasal verbs.