因此

我病了，因此我心情不好。

wǒ bìng le, yīn cǐ wǒ xīn qíng bù hǎo.

I am suffering from a mental disorder and my mood is not good.

他从小热爱音乐，因此长大后做了一名音乐老师。

tā cóng xiǎo rè ài yīn yuè, yīn cǐ zhǎng dà hòu zuò le yī míng yīn yuè lǎo shī.

He loved music since childhood, therefore he became a music teacher when he grew up.

他生病了，因此今天没来上课。

tā shēng bìng le, yīn cǐ jīn tiān méi lái shàng kè.

He was sick, therefore he didn't come to class today.