• 例1：He seriously warned the kids about the dangers of playing with electricity. （他严肃地警告了孩子们玩电的危险。）
• 对比：He warned the kids about the dangers of playing with electricity seriously.
• 例2：He secretly sold the national treasure to the enemy. （他秘密地把国宝卖给了敌人。）
• 对比：He sold the national treasure to the enemy secretly.