1. 动词 (v.) - 付钱
pay (sb.) for sth. 为某物付(某人)钱
I paid 50 yuan for the book. 我付了50元买这本书。
pay for sth. 为某物付钱
Did you pay for the coffee? 你付咖啡钱了吗？
pay sb. sth. = pay sth. to sb. 付给某人某物
I paid him the rent. 我把房租付给了他。
2. 动词 (v.) - 有收益
sth. (工作) + pay 某事物有报酬
Her job pays very well. 她的工作报酬很高。
3. 动词 (v.) - 付出代价 (引申义)
pay for (sth.) 为(过错)付出代价
You will pay for it! 你会为此付出代价的！
He paid for his mistake. 他为自己的错误付出了代价。
4. 动词 (v.) - 固定搭配
pay attention (to) 注意
Pay attention to the sign. 注意那个标志。
pay a visit (to) 拜访
We paid a visit to the museum. 我们参观了博物馆。
5. 名词 (n.) - 工资
He gets his pay every Friday. 他每周五领工资。