Objects
Let's talk about Object Pronouns!
In English, we say I know you and I buy it. In Spanish, you say I you know and I it buy.
Ese señor, yo lo conozco.
Esta mesa, yo la compro.
Use le to say to him, for her, etc., and les to say to/for them.
Compro la mesa para ella. Le compro la mesa.
Compro dos gatos para mis padres. Les compro dos gatos.