The president can veto congressional bills.. The use of can to ask or grant permission has been common since the 19th century and is well established, although some feel may is more appropriate in formal contexts.
See examples of can used in a sentence.. The new york knicks and the san antonio spurs last met in the nba finals back in 1999 — the spurs won the championship then — but this year, the two teams are facing off in the finals.