grammar

how do you know if a phrasal ver is seperable or not?

[Hi_there_Carl]

Phrasal verbs which take objects can be separable or inseparable:
Separable phrasal verbs can remain together when using an object that is a noun or noun phrase.

• I picked Tom up. OR I picked up Tom.
• They put their friends up. OR They put up their friends.

Separable phrasal verbs MUST be separated when a pronoun is used:

• We picked him up at the station. NOT We picked up him at the station.
• They put them up. NOT They put up them.

Inseparable phrasal verbs always remain together. It makes no difference if a noun or pronoun is used.

• We set off for the beach. / We set off for it.
• They are looking after the children. / They are looking after them.