Phrasal Verb Fun

fill in, fill out
You want to register, you have to fill in a form. You go to the tax office,
you must fill in twenty forms. You go to the bank for money, it is
necessary to fill in even more forms.
Forms without you are empty and useless. You have to fill them
in
.
All this is British English. In the United States, you have to fill out these
forms. A form is a sheet of paper
out
in front of you. (Think of
lay out
and
set out
your goods on a market stall.) You have to fill the thing out.
Separable two-word verbs
. Be careful.

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fill up
‘I have eaten too much Christmas dinner. I can't move. I'm full up.'
Up
often means 'complete'. To fill up means to fill something until it is full.
' How much do you want? says the man at the filling station.
'Fill it up, please.'
(He wants a full tank.)
Separable two-word verb
Careful.