Where the little word goes in two-part verbs
Where the object goes in two-part verbs - and the one position a pronoun is never allowed to take.
Please turn off the television - or just turn it off at the wall.
A separable phrasal verb lets its object sit in two places: after the particle, or between the verb and the particle. With a noun object, both orders are correct. With a pronoun object there is no choice at all - the pronoun must go between the two parts, never after the particle. Inseparable phrasal verbs are the mirror image: their object always follows the particle, whatever kind of word it is.
The mistake that marks a learner instantly is placing a pronoun after the particle. Nouns give you a free choice; pronouns never do. And do not try to split an inseparable verb - its two parts work as a single word and cannot be pulled apart.