抬 背 带和 拿 with the meaning of carry. 抬 means to carry, to move or to lift, but usually for two or more people. like 我们把这张桌子抬到那里去吧 & 你把这张桌子搬到那里去吧。 so 我们 抬 and 你 搬 搬 can be one or more person. 背， as a noun, fourth tone, it means the back of your body, so when it means to carry, first tone, it means to carry on the back, sometimes on shoulder. 带 and 拿， sometimes we can use either or them in a sentence, like here, 明天你来公司的时候， 请把你的笔记本电脑带来or 拿来。 but for 拿 the bottom of it is a hand, 手， so when we emphasize that we carry or hold something with our hands, we use 拿。 like, 他手里拿着两张电影票。 or 他拿着两张电影票。 抬和背是比较简单的， 带和拿 多看看例句 来感受它们的不同吧。

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*Not a native speaker* My understanding of these words is as follows: 1) 背 means to carry on your back, or by using your whole body. For example, you can '背' a person, or a child. I think it also has a meaning of 'carrying' or 'bearing' responsibility but I'm not sure. 2) 带 means to 'take' or 'bring' something with you. For example, 别忘了带钥匙 (don't forget to bring your keys). It applies to small things (like keys) or big things (like luggage). 3) 拿 means to 'hold' or 'take' in the hand. For example, 帮我拿一下钥匙 means 'Pick my keys up for me/help me take my keys'. More examples: 拿来 = bring here. 他手里拿着一本书 = He's holding a book in his hand. 4) 抬 - I'm not so sure about, but it's describes more the action of lifting something up (that will be put down again soon). For example: 抬头 = lift/raise your head, 抬胳膊 = raise your arm, 把椅子抬起来 = lift the chair. I hope that helps! Native speakers please correct any mistakes! 谢谢!

抬:1. to move one heavy thing to another place, like a table,a heavy box .”你能帮我一起抬桌子吗？它太重了。“means"Can you help me to lift up this table?It's too heavy." In this kind of situation,you can also use 搬 , like 搬桌子 2.抬头raise your head.Teacher may say "抬头，看黑板“ which means”raise your head,look at the blackboard" 背:carry a thing on your shoulder,like a school bag, we say “背书包” 带:carry/take one small thing with you, like a book, phone, key, bottle. We would say:"不要忘了带钥匙（Don't forget to take your key）“ 拿:go to somewhere to get something. 拿快递(get your package)拿报纸（get newspaper) You should learn to use a Chinese dictionary, all Chinese children learned to use it when they were in elementary school.If you have more questions , you can ask me. My English is not very good but I'll try to help you.