to tear paper into a lot of small pieces

He tore the letter up and threw it away. 他把信撕碎扔掉了。

If you tear up an agreement, you refuse to accept it or be controlled by it any more.

She tore up the contract and walked out. 她撕毁合同，然后退席离开。

to get tears in your eyes, so that you almost start to cry, because you are experiencing strong emotion

She teared up as the award was presented to her. 当奖项授予给她时，她眼里涌起了泪水。