1. be surprised at / by sth 对某事感到吃惊2. be surprised to do sth 或 be surprised that + 从句 对做某事感到吃惊 3. 没有be surprised with/about sth. 4. 令某人吃惊的 to one's surprise
be surprised at sth 对某事感到吃惊be surprised at doing sth 对做某事感到吃惊