Learn Swedish: Skräpmat kommer aldrig att bli nyttig. - Junk food will never become healthy.

In a Swedish main clause, sentence adverbs like aldrig (never) or inte (not) usually go directly after the first, conjugated verb. This means it naturally splits the kommer att construction, landing right after kommer.

Wait, shouldn't the infinitive marker att stay attached to kommer?

It is a common trap to think of kommer att as an inseparable block. In Swedish grammar, att actually belongs to the infinitive verb that follows it (att bli). That is why the adverb aldrig slips in before att bli rather than after it.

Why use kommer att instead of ska to say "will"?

Kommer att is used for future predictions or things that will happen naturally outside of anyone's control. Ska usually implies a plan, decision, or promise. Since junk food doesn't have a personal intention to be unhealthy, kommer att is the correct choice.

Why is the adjective nyttig instead of nyttigt?