Hello everyone,

Please help me with this one:

R.Murphy English Grammar In Use says:

"Sometimes a phrasal verb has an object. Usually there are two possible positions for the object. So you can say:

I turned on the light. I turned the light on.

If the object is a pronoun (it/them/me/him etc.), only one position is possible.

I turned it on.

But how about this sentence:

She is looking after it.

We can't say "She is looking him after."

So, if "look after" is a phrasal verb, then why don't we put personal pronoun "it" in the middle as it says in the above mentioned rule?

Thank you.