Brush up on
Meaning: to improve your skills in something, to review
Example: I'm trying to brush up on my French before I go to Paris. You need to brush up on the tenses.
Выучи грамотный разговорный английский до уверенного владения всего за 9 месяцев по системе естественного усвоения иностранных языков. Жми!
Example: I'm trying to brush up on my French before I go to Paris. You need to brush up on the tenses.