careful（英 [ˈkeəfl] 美 ['kɛrfl]）
造句：
1、Be careful. Don't slur your shirt. 小心点，别弄脏了你的衬衣。
2、The accident taught him to be more careful. 这起事故的教训使他变得更小心。
3、Be careful not to capsize the boat. 小心不要把船弄翻。
4、So, we have to be careful. 那么我们必须小心。
5、You should be more careful. 你应该更加小心。