Usage note
以后用来表示时间上的先后顺序，通常放在句子的后面。
yǐhòu lái yòng bǎo shí shí jiān de xiāng hòu xún jìng, tōng cháng fàng zài jù zi de hái bāi.
以后 is used to indicate the sequence of time, usually placed at the end of a sentence.
Context note
以后常用于描述过去和未来的关系，比如计划、安排等。
yǐhòu cháng yòng yú miáo shù guò qù hé wèi lái de guān xì, bǐ rú jì huà、āng pái děng.
以后 is often used to describe the relationship between past and future, such as plans and arrangements.
5 examples
我们以后再一起玩吧。
wǒ men yǐ hòu zài yì qǐ wán ba。
Let's play together another time.
他以后会来参加活动的。
tā yǐ hòu huì lái cān jiā huó dòng de。
He will come to participate in the event later on.
这个周末我们以后再讨论吧。
zhè ge zhōu mò wǒ men yǐ hòu zài tǎo lùn ba。
We can discuss this over the weekend later on.
你以后要更加努力学习。
nǐ yǐ hòu yào gèng jiā nǔ lì xué xí。
You need to work harder in your studies from now on.
我们以后每周都来上课吧。
wǒ men yǐ hòu měi zhōu dōu lái shàng kè ba。
Let's have classes together every week from now on.
5 mini stories
妈妈说，以后每天都要早点回家。爸爸说，以后周末可以多陪孩子玩。
mā ma shuō， yǐ hòu měi tiān dōu yào zǎo diǎn huí jiā。 bà ba shuō， yǐ hòu zhōu mò kě yǐ duō péi hái zi wán。
Mom said, we should go home early every day in the future. Dad said, we can spend more time with our child on weekends.
老师告诉我们，以后要更加认真听讲。同学们说，以后上课也要更积极回答问题。
lǎo shī gào sù wǒ men， yǐ hòu yào gèng jiā rèn zhēn tīng jiǎng。 tóng xué men shuō， yǐ hòu shàng kè yě yào gèng jī jí huí dá wèn tí。
The teacher told us to listen more attentively from now on. The classmates said they would answer questions more actively in class.
爸爸说，以后每天晚上都要早点睡觉。妈妈说，以后周末可以多带孩子出去玩。
bà ba shuō， yǐ hòu měi tiān wǎn shàng dōu yào zǎo diǎn shuì jiào。 mā ma shuō， yǐ hòu zhōu mò kě yǐ duō dài hái zi chū qù wán。
Dad said we should go to bed early every night from now on. Mom said, we can take our child out more often on weekends.
老师告诉我们，以后要更加努力学习。同学们说，以后考试也要更认真准备。
lǎo shī gào sù wǒ men， yǐ hòu yào gèng jiā nǔ lì xué xí。 tóng xué men shuō， yǐ hòu kǎo shì yě yào gèng rèn zhēn zhǔn bèi。
The teacher told us to work harder in our studies from now on. The classmates said they would prepare for exams more seriously.
妈妈说，以后每天都要早点起床。爸爸说，以后周末可以多陪孩子玩。
mā ma shuō， yǐ hòu měi tiān dōu yào zǎo diǎn qǐ chuáng。 bà ba shuō， yǐ hòu zhōu mò kě yǐ duō péi hái zi wán。
Mom said we should get up early every day from now on. Dad said, we can spend more time with our child on weekends.
Mini dialogue
放学以后
A
放学以后你想做什么？
Fàngxué yǐhòu nǐ xiǎng zuò shénme?
What do you want to do after school?
B
放学以后我想去公园玩。
Fàngxué yǐhòu wǒ xiǎng qù gōngyuán wán.
After school, I want to go play in the park.
长大以后
A
你长大以后想当什么？
Nǐ zhǎngdà yǐhòu xiǎng dāng shénme?
What do you want to be when you grow up?
B
长大以后我想当老师。
Zhǎngdà yǐhòu wǒ xiǎng dāng lǎoshī.
After I grow up, I want to be a teacher.
Related words and contrasts
similar
后来
hòulái
later
后来 is for past events; 以后 can be for future or past
related
然后
ránhòu
then
然后 shows sequence; 以后 shows time after an event