因为我喜欢苹果，所以我买了它。 Yīnwèi wǒ xǐhuān píngguǒ, suǒyǐ wǒ mǎi le tā. Because I like apples, so I bought them.
因为您在这儿，所以我也来了。 Yīnwèi nín zài zhèr, suǒyǐ wǒ yě lái le. Because you are here, so I came as well.
因为我累，所以我不去。 Yīnwèi wǒ lèi, suǒyǐ wǒ bù qù. Because I am tired, so I will not go.
因为下雨，所以我在家。 Yīnwèi xiàyǔ, suǒyǐ wǒ zài jiā. Because it is raining, so I am at home.
因为……所以…… is pronounced yīnwèi…suǒyǐ… and means “because…so…”. It is one of the words in the HSK 2 vocabulary, a level of the Hanyu Shuiping Kaoshi, China’s standardised Chinese proficiency test. Recognising a word on a page and recalling it when you need it are different skills, and only the second survives a conversation — which is why LexiTrail shows you 因为……所以…… again just before you would have forgotten it, rather than on a fixed schedule.