Wǒ qiàn tā hěnduō qián.

我欠他很多钱。

I owed him a lot of money.

Notes:

我(wǒ): I

欠(qiàn): owe

他(tā): he

很多(hěnduō): a lot of

钱(qián): money

Example:

A：我欠了他很多钱。

     Wǒ qiàn tā hěnduō qián.

     I owed him a lot of money.

B：我也是。

     Wǒ yě shì.

     Me too.