因为所以

yīn wèi wǒ shì qing tài duō suǒ yǐ zhí dào jīn tiān cái lái kàn nǐ

因为我事情太多，所以直到今天才来看你。

I didn't come to see you till today because I was terribly busy.

yīn wèi tiān qì bù hǎo suǒ yǐ fēi jī bù néng àn shí qǐ fēi

因为天气不好，所以飞机不能按时起飞。

Because of bad weather, the plane didn't take off on time.