careful，carefully都是小心的意思，前者是形容词,作定语或表语。后者是副词,作状语,修饰动词或整个句子。
音标：英 [ˈkeəfl] 美 [ˈkerfl]
释义：仔细的，小心的;周到的;慎;心细
1、You must be careful when handling chemicals.
接触化学药品必须小心谨慎。
2、Be careful of the traffic.
注意交通安全。
3、Please be careful with my glasses (= Don't break them) .
请当心别打碎我的眼镜。
4、Be careful you don't bump your head.
留神别撞了头。
音标：英 ['keəfəlɪ] 美 [ˈkɛrfəlɪ]
释义：仔细地;小心谨慎地;警惕地;周密地
1、He is a slippery customer, and should be carefully watched.
他是一个狡猾的顾客，要小心提防。
2、Liz drew the word out carefully.
莉兹小心翼翼地说出了那个词。
3、All through lunch he had carefully avoided the subject of the house.
整个午饭期间，他一直在小心翼翼地回避房子的话题。
4、They are carefully graded.
它们被仔细地分成各种级别。
careful，carefully都是小心的意思，前者是形容词,作定语或表语。后者是副词,作状语,修饰动词或整个句子。
音标：英 [ˈkeəfl] 美 [ˈkerfl]
释义：仔细的，小心的;周到的;慎;心细
1、You must be careful when handling chemicals.
接触化学药品必须小心谨慎。
2、Be careful of the traffic.
注意交通安全。
3、Please be careful with my glasses (= Don't break them) .
请当心别打碎我的眼镜。
4、Be careful you don't bump your head.
留神别撞了头。
音标：英 ['keəfəlɪ] 美 [ˈkɛrfəlɪ]
释义：仔细地;小心谨慎地;警惕地;周密地
1、He is a slippery customer, and should be carefully watched.
他是一个狡猾的顾客，要小心提防。
2、Liz drew the word out carefully.
莉兹小心翼翼地说出了那个词。
3、All through lunch he had carefully avoided the subject of the house.
整个午饭期间，他一直在小心翼翼地回避房子的话题。
4、They are carefully graded.
它们被仔细地分成各种级别。
本回答被网友采纳careful是形容词，作定语或表语。
carefully是副词，作状语，修饰动词或整个句子。
其用法分别如下：
careful
1、[not before noun] ~ (to do sth) | ~ (not to do sth) | ~ (when/what/how, etc.) | ~ (of/about/with sth)
小心；注意；谨慎
giving attention or thought to what you are doing so that you avoid hurting yourself, damaging sth or doing sth wrong
Be careful!
小心！
He was careful to keep out of sight.
他小心翼翼地躲开别人的视线。
Be careful not to wake the baby.
注意别吵醒了宝宝。
You must be careful when handling chemicals.
接触化学药品必须小心谨慎。
Be careful of the traffic.
注意交通安全。
Please be careful with my glasses (= Don't break them) .
请当心别打碎我的眼镜。
Be careful you don't bump your head.
留神别撞了头。
2、细致的；精心的；慎重的
giving a lot of attention to details
a careful piece of work
精雕细琢的作品
a careful examination of the facts
对事实的仔细调查
After careful consideration we have decided to offer you the job.
经过慎重考虑后，我们决定给你这份工作。
carefully
1、We carefully watched every detail of his action.
我们仔细观察了他动作的每个细节。
2、I backed up carefully until I felt the wall against my back
我小心翼翼地后退，直到感觉后背碰到了墙壁。
3、He studied the keyboard carefully, one finger poised.
他仔细研究了键盘，一个手指随时准备敲击。
4、He folded the paper carefully
他把纸小心地折起来。
5、I am carefully selecting the breeding stock
我正在精心挑选种畜。
本回答被网友采纳careful是形容词,用在名词之前.
carefully是副词,用在动词和形容词之前.
careful 形容词，修饰名词
adj. 仔细的，小心的； 周到的； 慎； 心细
carefully 副词，修饰动词、形容词或者副词
adv. 小心谨慎地； 警惕地； 仔细地； 周密地