The pronouns 前者 and 后者
We use these pronouns to avoid repetition in speech.
We use the pronouns 前者 
and 后者 when referring to something that has been mentioned before.
The pronoun 前者 refers to what is said first, while the pronoun 后者 refers to what is said next.
and 后者 when referring to something that has been mentioned before.
The pronoun 前者 refers to what is said first, while the pronoun 后者 refers to what is said next.Examples
学汉语和学英语都不容易，前者难在发音和汉字，后者难在语法
Learning Chinese and English is not easy. The first one is difficult because of pronunciation and writing characters, and the second one is difficult because of grammar
xué hànyǔ hé xué yīngyǔ dōu bù róngyì, qiánzhě nán zài fāyīn hé hànzì, hòuzhě nán zài yǔfǎ
咖啡喝茶对我来说，都是一天也不能少的朋友，相比之下，我更喜欢后者
For me, both coffee and tea are like friends that I can’t do without, but I mostly prefer the latter
kāfēi hē chá duì wǒ lái shuō, dōu shì yì tiān yě bù néng shǎo de péngyou, xiāngbǐ zhī xià, wǒ gèng xǐhuan hòuzhě
美德与邪恶是不同的，前者带来和平，后者导致痛苦
There is a difference between virtue and vice. The first one brings the peace, and the second one causes pain
měidé yǔ xié'è shì bùtóng de, qiánzhě dàilái hépíng, hòuzhě dǎozhì tòngkǔ
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