careless 核心词议：
adj. 粗心的；漫不经心的
careless 基本解释
adj. 粗心的；无忧无虑的；漫不经心的，不介意的；淡漠的
速记方法
速记技巧
词源记忆法
care, 关心；-less, 否定词缀=不关心，所以很粗心，漫不经心的。
知识扩展
句子比较
比较以下两句结构不同，但含义相同：It was careless of you to leave the room unlocked.=You were careless to leave the room unlocked.你没有把门锁上真是太粗心(太大意)了。2.be careful in doing sth与be careful to do sth：前者指做某事时很粗心，后者指粗心地做了某事(不定式为结果状语)：He was careless to make some mistakes.他很粗心，结果出了些错。/He was careless in typing the letter.他打印这封信时很粗心。
词组短语
careless of 不顾；不关心；不在乎
careless driving 不小心驾驶；粗心驾车
careless mistake 粗心错误，疏忽
careless about 对…粗心
careless 变化形式
比较级： more careless
最高级： most careless
易混淆的单词： Careless
中文词源：
careless 粗心的
care, 关心。-less, 否定词缀。
careless
精选例句
1、 The person who sets out late might be careless in driving.
出发晚的人开车可能不小心。[机器自动翻译，如有错误，感谢纠错]
2、 Tom is careless in preparing his lesson.
汤姆准功课不细心。
1、 They are dangerous only if programmers are careless.
只有当程序员粗心的时候，它们才是危险的。
常见考点例句：
- Many accidents happen because people are careless .
- 很多事故是由人们的粗心引起的。
- The profits of a brilliant trade can be thrown away in a moment by a careless blunder .
- 一个粗心的错误在一瞬间内可让一笔极佳交易的利润损失殆尽。
- And above all I can understand why we are sloppy and careless because it 's a lot less effort than being careful .
- 最为重要的是，我能理解我们为什么草率和粗心，因为这要比认真少花很多力气。
- But it was a very prominent misprint and you will perhaps wonder how I could have been so careless as to overlook it .
- 但它却是一个非常重要的印刷错误，而你或许会为我为何会如此粗心以致忽视这一点而疑惑。
- Take seagull as an example again the seagull wiki has a detailed rundown of the framework 's installation process that has several key steps that are sometimes easily overlooked by careless or unsuspecting developers .
- 仍然用seagull作为例子seagull的wiki上有一份详细的框架安装流程，其中有几个关键步骤有时候常常被粗心或者没有戒心的开发者轻易地忽略了。