Formal:
* 我愛你勝過一切 (wǒ ài nǐ shèngguò yīqiè): This literally translates to "I love you more than everything," and is the most direct and formal way to express this sentiment.
* 你是我生命中最重要的人 (nǐ shì wǒ shēngmìng zhōng zuì zhòngyào de rén): This means "You are the most important person in my life," which implies a deep and enduring love.
Informal:
* 我超愛你的 (wǒ chāo ài nǐ de): This means "I love you so much," and is a more casual way to express strong affection.
* 你就是我的一切 (nǐ jiùshì wǒ de yīqiè): This translates to "You are everything to me," emphasizing the importance of the person in your life.
Romantic:
* 我愛你超過一切 (wǒ ài nǐ chāoguò yīqiè): This means "I love you more than anything," and is a more romantic way to say it than the formal "我愛你勝過一切."
Ultimately, the best way to say "I love you more than anything" in Mandarin depends on your relationship with the person you're talking to and the specific context of the situation.