带
dài
带: whatever is stuck to you comes along
The picture Something is fastened to you, so when you move, it moves too. 拿 is holding something in your hand; 带 is having it attached to you as you go — which is why you 带 a child somewhere, never 拿 one.
Where the picture shows up in 带
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carry it on you
出门别忘了带钥匙。
chū mén bié wàng le dài yàoshi
Don't forget your keys on the way out.
The keys go into your pocket and walk out the door with you.
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bring a person along
我带你去看医生。
wǒ dài nǐ qù kàn yīshēng
I'll take you to the doctor.
You take their arm and the two of you walk to the clinic side by side.
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it comes attached
这个手机带充电器吗？
zhège shǒujī dài chōngdiànqì ma
Does this phone come with a charger?
You open the box and the charger is lying there beside the phone.
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it clings to how you sound
他说话带着口音。
tā shuōhuà dài zhe kǒuyīn
He speaks with an accent.
The words leave his mouth with the accent of his hometown trailing behind them.
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keep them at your side and teach
师傅带了三个徒弟。
shīfu dài le sān ge túdì
That master has three apprentices under him.
Three apprentices trail along behind the master wherever he goes.
All of it in one picture
带 is one thing fastened to another and moving with it. The keys ride in your pocket and leave with you; the person walks at your side and arrives with you; the charger sits in the box and ships with the phone. The hometown accent rides out on his words, and three apprentices ride along behind their master. So anything with 带 says: I move, and it moves with me.