過guò to pass, to cross, to go over to live, to pass (time) excessive, too much follows a verb to indicate that something has been done before HSK 1TOCFL 1
還是háishi still, nevertheless, after all (indicating that a situation remains unchanged) or, or else (used to present an alternative) it would be better to, might as well (suggesting a preferable option) HSK 1TOCFL 1
了le / liǎo a particle indicating a completed action (le) to understand, to comprehend (liǎo), see 了解 HSK 1TOCFL 1