Usage note
“因而”表示因为前面的原因，所以有后面的结果。
“Yīn ér” biǎoshì yīnwèi qiánmiàn de yuányīn, suǒyǐ yǒu hòumiàn de jiéguǒ.
“Yīn ér” indicates that because of the previous reason, there is a following result.
Context note
我们常用“因而”来连接原因和结果，让句子更清楚。
Wǒmen cháng yòng “yīn ér” lái liánjiē yuányīn hé jiéguǒ, ràng jùzi gèng qīngchu.
We often use “yīn ér” to connect cause and effect, making sentences clearer.
5 examples
下雨了，因而我们不去公园。
xià yǔ le， yīn ér wǒ men bú qù gōng yuán。
It rained, therefore we didn't go to the park.
他努力学习，因而考了高分。
tā nǔ lì xué xí， yīn ér kǎo le gāo fēn。
He studied hard, therefore he got a high score.
路很滑，因而走路要小心。
lù hěn huá， yīn ér zǒu lù yào xiǎo xīn。
The road was slippery, therefore we had to walk carefully.
天黑了，因而我们回家了。
tiān hēi le， yīn ér wǒ men huí jiā le。
It got dark, therefore we went home.
他生病了，因而没来上课。
tā shēng bìng le， yīn ér méi lái shàng kè。
He was sick, therefore he didn't come to class.
5 mini stories
今天风很大，因而我们没放风筝。我们就在家里画画。
jīn tiān fēng hěn dà， yīn ér wǒ men méi fàng fēng zheng。 wǒ men jiù zài jiā lǐ huà huà。
It was very windy today, therefore we didn't fly kites. We just drew at home.
小华帮助同学，因而大家都很喜欢他。他也很开心。
xiǎo huá bāng zhù tóng xué， yīn ér dà jiā dōu hěn xǐ huan tā。 tā yě hěn kāi xīn。
Xiao Hua helped classmates, therefore everyone liked him. He was also happy.
图书馆很安静，因而我们小声说话。这样不影响别人。
tú shū guǎn hěn ān jìng， yīn ér wǒ men xiǎo shēng shuō huà。 zhè yàng bù yǐng xiǎng bié rén。
The library was very quiet, therefore we spoke softly. This way we didn't disturb others.
妈妈做了好吃的蛋糕，因而我们都很高兴。我们吃了很多。
mā mā zuò le hǎo chī de dàn gāo， yīn ér wǒ men dōu hěn gāo xìng。 wǒ men chī le hěn duō。
Mom made delicious cake, therefore we were all happy. We ate a lot.
春天来了，因而花儿都开了。公园里很漂亮。
chūn tiān lái le， yīn ér huā ér dōu kāi le。 gōng yuán lǐ hěn piào liang。
Spring came, therefore the flowers all bloomed. The park was very beautiful.
Mini dialogue
下雨了
A
今天下大雨，因而我们不能去公园了。
Jīntiān xià dà yǔ, yīn'ér wǒmen bù néng qù gōngyuán le.
It's raining heavily today, therefore we can't go to the park.
B
没关系，我们可以在家玩游戏。
Méi guānxi, wǒmen kěyǐ zài jiā wán yóuxì.
It's okay, we can play games at home.
努力学习
A
他每天练习，因而中文说得很好。
Tā měitiān liànxí, yīn'ér Zhōngwén shuō de hěn hǎo.
He practices every day, therefore he speaks Chinese very well.
B
我也要努力，因而能进步。
Wǒ yě yào nǔlì, yīn'ér néng jìnbù.
I will also work hard, therefore I can improve.
Related words and contrasts
similar
所以
suǒyǐ
so, therefore
commonly used conjunction for result
similar
因此
yīncǐ
thus, hence
formal equivalent of 因而
similar
于是
yúshì
thereupon, as a result
indicates a natural consequence