A lot, a little: verb + nhiều / ít

Nhiều (a lot) and ít (a little) can say how much you do something. Then they go after the verb, or after the verb and the thing it's done to: Anh ấy ăn nhiều. He eats a lot. Dạo này em ngủ ít. I haven't been sleeping much lately. Cảm ơn chị nhiều. Thanks a lot.

Add hơn to compare: ăn nhiều hơn (eat more), nói ít hơn (talk less). A host might tell you Ăn nhiều vô! Eat up! (in Hà Nội Ăn nhiều vào!).

Ít can also go before the verb, meaning "not often, not much": Dạo này tôi ít đi chơi. I don't go out much these days. Ba em ít nói. My dad doesn't say much.

Right before a noun, nhiều and ít mean "many" and "few", so they count the thing, not the doing: uống nhiều nước is "drink a lot of water". For liking something a lot, rất or lắm is the usual choice: Tôi thích Sài Gòn lắm.