Pick up/ pick me up

[anamica]

What are the grammatical rules for using "pick up" and "pick me up"!

Please explain, the rules for using "pick up" for the following sentences.


A) i.)Does anyone know who will come to the house to pick up stuff?

ii.)Does anyone know who will come to the house to pick stuff up?

B) i. Parents will come to pick up their children.

ii. Parents will come to pick their children up.

C) My uncle will come to pick me up?

D) Can you please pick it up for me from the store on your way?


Thanks

[Tdol]

When you have just a pronoun, it must come between the verb and particle, while a noun phrase can come before or after.