regret doing

　　be serious about

　　achieve one’s dream

　　spend time with sb

　　stop doing sth

　　make this choice

　　keep off

　　make one’s own decision

　　二、习惯性用法：

　　Sixteen-year-olds should be allowed to get their pieced.

　　I regret talking back， not listening to Mom.

　　But sometimes these can get in the way of their schoolwork...