Formal:
* 很聪明 (hěn cōngmíng): This is the most common and neutral way to say "very smart".
* 很智慧 (hěn zhìhuì): This means "very wise" and is a more formal and elevated way to express intelligence.
Informal:
* 很机灵 (hěn jīlíng): This means "very quick-witted" or "very clever" and is more informal than "聪明".
* 很聪明 (hěn cōngmíng): This can also be used informally, but it's less common than "机灵".
You can also use these phrases to describe someone's intelligence:
* 智力高 (zhìlì gāo): This means "high intelligence" and is more clinical.
* 头脑灵活 (tóunǎo línghuó): This means "flexible mind" and implies a quick and adaptable thinker.
Here are some examples:
* 他很聪明。 (Tā hěn cōngmíng.) He is very smart.
* 她很有智慧。 (Tā hěn yǒu zhìhuì.) She is very wise.
* 你很机灵。 (Nǐ hěn jīlíng.) You are very clever.
The best way to choose the right phrase depends on the situation and your relationship with the person you're speaking to.