you (singular); used for peers, younger people, or as a general informal term of address (in Taiwan, a female-specific variant form is sometimes used)

I; me; myself

used in coordination with 我 wǒ or 他 tā to indicate multiple people or reciprocal actions

used in combination with 你 nǐ to refer to people in general or reciprocal actions (e.g. 你来我往 nǐ​lái​wǒ​wǎng)