careless的副词形式为carelessly。careless作为形容词，基本含义为“不小心的”、“不仔细的”、“粗心造成的”、“疏忽引起的”、“不担忧的”、“无忧无虑的”、“淡漠的”；carelessly作为副词形式，基本含义为“粗心地”、“不用心地”。
一、careless的中文含义及用法介绍
careless作为形容词，意为不小心的;不仔细的;粗心造成的;疏忽引起的;不担忧的;无忧无虑的;淡漠的。
例句：I am a careless owner, I am guilty, very sad!
我是一个不小心的主人，我有罪过，非常难过！
It only takes one careless driver to cause an accident.
只要有一个粗心大意的驾驶员便会发生车祸。
He signed cheques with careless abandon.
他无所顾忌地乱开支票。
That shows a fairly careless attitude to clothes, doesn't it?
那表明此人不讲究穿着，是吧？
He had shown himself careless of personal safety where the life of his colleagues might be at risk
当同事身处危险时他表现英勇，不顾个人安危。
With a careless flip of his wrists, he sent the ball quickly on its way.
他手腕轻轻一抖，球就飞出去了。
Careless drivers hazard passengers' lives as well as their own.
粗心大意的驾驶者拿乘客和自己的生命冒险。
To be crude and careless is an extremely bad style of work.
粗枝大叶是一种极坏的作风。
The character was obviously wrong but he didn't pick it out. It shows how careless he was.
这么明显的错字他都没看出来，可见他很粗心。
A careless mistake cost the company millions of dollars.
一次疏忽造成了公司数百万美元的损失。
She is so careless that she past over some exam questions.
她竟然粗心到考试会漏题。
二、carelessly的中文含义及用法
carelessly作为副词，意为粗心地;不用心地。
例句：Used incorrectly or carelessly or for an improper purpose.
为一个不正当的目标而不正确或粗心地使用的。
Someone had carelessly left a window open.
有人粗心大意忘了关一扇窗。
He carelessly left the garage door unlocked
他太粗心大意，竟然没锁车库的门。
Products must be strictly, not carelessly, inspected before they leave the factory.
产品出厂要严格检查，马马虎虎可不行。
The boy wrote his sentence on the blackboard carelessly, and he had to go over it.
那个男生粗枝大叶地把自己造的句子写在黑板上，所以他不得不再做一遍。
For I do not want any one to read my book carelessly.
我可不喜欢人们轻率地读我的书。
I have to say that you did the work very carelessly.
我得说你这项工作做得非常马虎。
It is shame that there are so many people who waste their time carelessly.
这么多人漫不经心地任时间流逝，这是很遗憾的事。
