Phrasal verbs vs. prepositional verbs: position of the object

Structure of phrasal verbs
A phrasal verb can be made up of: a verb + adverb throw away
a verb + adverb + preposition put up with


Structure of prepositional verbs
A prepositional verb is made up of:
a verb + preposition look after, look at
wait for, think about
talk about, complain about

Position of the object: phrasal verbs vs. prepositional verbs

1. With a phrasal verb (verb + adverb), the position of the object (a noun) is flexible, i.e. it can sit either between the verb and the adverb or after the adverb:

She gave all her money away. [the object 'all her money' is between the verb and the adverb]
or
She gave away all her money. [the object 'all her money' is after the adverb]

! When the object is a pronoun (him, her, us, them, etc.), it must sit between the verb and the adverb:

She gave it away.
NOT
She gave away it.

2. With prepositional verbs (verb + preposition), the position of the object—regardless of whether it’s a noun or pronoun—is not flexible. The object must sit after the preposition:

We looked after the children.
We looked after them.
We looked the children after.
We looked them after.

See also:
Vocabulary section: Phrasal verbs with ‘put’
Vocabulary section: Phrasal verbs with ‘come’