Forgeries do not remain undetected

to forget oneself

to forget one’s manners

to forget to do something

Forget it!

to forget about someone

Forget it, it's not worth it.

to forgive

Forgive us, please. We made a mistake.

Forgive them for they know not what they do!

Forgive us our trespasses as we forgive them that trespass against us!

Forgive me, please! I messed up.

Forgive my curiosity, but ...

I forgot [all] about it

So he forgot it after all

I forgot about it

I forgot to call you.

I forgot the date.

I forgot the title of the book.

to fork out money

to fork out

to fork over

forlorn hope

to form an opinion

to form an obstacle