Intransitive phrasal verb
An intransitive phrasal verb doesn’t require any direct object to complete its meaning. For example:
- He slept.
 - She laughed.
 - They danced.
 
Transitive phrasal verb
A transitive phrasal verb requires an object to complete its meaning. For example:
- She turned off the TV.
 - You put it on.
 - I took them off.
 
Separable and Inseparable
Some transitive phrasal verbs can have the object between the verb and the particle, or after the particle. For example:
- She turned off the TV. ✅
 - She turned the TV off. ✅
 
Some transitive phrasal verbs can only have the object after the particle, especially when the object is a pronoun.
- He explained the problem to me. ✅
 - He explained me the problem. ❌
 
When we replace the object with a pronoun, we must place the pronoun between the verb and the particle.
- You put it on. ✅
 - You put on it. ❌
 - I took them off. ✅
 - I took off them. ❌
 
References