carefree和careless的区别：中文含义不同、用法不同。carefree作为形容词，中文含义为“无忧无虑的”、“不负责任的”、“无牵挂的”；careless作为形容词，中文含义为“不小心的”、“粗心的”、“疏忽引起的”、“不担忧的”。
一、carefree的基本含义及用法介绍
carefree作为形容词时，意为无忧无虑的;无牵挂的;不负责任的。
例句：He looked happy and carefree.
他看起来轻松愉快。
My mother lives a carefree life in the country.
我的母亲在乡村过着无忧无虑的生活。
She had made their childhood so joyous and carefree.
她使他们的童年充满欢乐，无忧无虑。
Thumbing a lift had once a carefree, easy-going image.
伸手搭便车曾经给人以轻松随意的形象。
Robert remembered the carefree summers at the beach.
罗伯特记起了在海滩上度过的无忧无虑的夏日时光。
He turned his face to look up at the sky in a carefree manner.
他仰首望着天，做出一副满不在乎的神气。
Learning Chinese in daily life is carefree and easy.
生活之中学汉语，让你轻松又好记。
Love has not yet come, the day is carefree;
爱情还没有来到，日子是无忧无虑的；
二、careless的基本含义及用法介绍
careless作为形容词，意为不小心的;不仔细的;粗心的;粗心造成的;疏忽引起的;不担忧的;无忧无虑的。
例句：It was careless of me to leave the door open.
怪我粗心忘了关门。
He seemed careless of his own safety.
他仿佛已把自己的安危置之度外。
She gave a careless shrug.
她漠然地耸了耸肩。
I'm sorry. How careless of me...
对不起,我太不小心了。
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。
That shows a fairly careless attitude to clothes, doesn't it?
那表明此人不讲究穿着，是吧？
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。
