as brave as sb和as brave as sb is那个正确

as brave as sb.正确
而as brave as sb.is则不正确
例句：Peter is as brave as Tom.
彼得和汤姆一样勇敢.
As brave as a tiger,Jim crashed to catch the thief.
吉姆像老虎般勇敢地冲去抓贼.
另外：
as+形容词+as sb./sth.结构 对于所有形容词通用!
衷心地祝你快乐…