smjörlíki v angličtině:

Would you prefer margarine or butter?

Do you prefer butter or margarine?

We substitute margarine for butter.

You can use margarine as a substitute for butter.

Did you mistake the margarine for butter?

Can you tell butter from margarine?

There was a tub of margarine in the fridge.

Can you pass me the low-fat margarine?

That's not butter. It's margarine.