。
She studies English every day.
Literal
She [topic-は] English [object-を] every-day studies.
A clean polite habitual. 毎日 ('every day') sets up a recurring frame; the polite non-past 勉強します then takes its standard habitual reading — not 'will study' but 'studies as a routine.' Adverbs of frequency are what tip the verb form into the habitual interpretation; without one, the same form often reads as future or one-off. This is the standard textbook pattern for everyday-routine descriptions.