我去公园，因为天气很好。
wǒqù gōngyuán ， yīnwèi tiānqì hěnhǎo 。
I go to the park because the weather is very nice.
她没有来，因为她生病了。
tā méiyǒu lái ， yīnwèi tā shēngbìng le 。
She didn't come because she was sick.
我喜欢这本书，因为故事很有趣。
wǒ xǐhuān zhè běn shū ， yīnwèi gùshì hěn yǒuqù 。
I like this book because the story is very interesting.