Usage note
忘记（忘）这个词用来表示忘记了某事或某物。
wàng cǐ céng zǒu lái bèi yòng lái biǎo shì gùshì huò qí mò wù.
The word 忘 (wàng) is used to express forgetting something or someone.
Context note
忘记常用于日常生活中的对话，比如忘记带钥匙或忘记做作业。
wàng cháng yòng yú rìjī shēnqíng zhōng de huàhuà, bǐrú wàng qì dài kési huò qǐ wàng zuò zuòyè.
Forget is commonly used in daily conversations, such as forgetting to bring a key or homework.
5 examples
我忘记带伞了。
wǒ wàng jì dài sǎn le。
I forgot to bring an umbrella.
他忘记做作业。
tā wàng jì zuò zuò yè。
He forgot to do his homework.
妈妈忘记买菜了。
mā ma wàng jì mǎi cài le。
Mom forgot to buy vegetables.
我忘记关窗户了。
wǒ wàng jì guān chuāng hù le。
I forgot to close the window.
他忘记带钱包了。
tā wàng jì dài qián bāo le。
He forgot to bring his wallet
5 mini stories
小明忘记带作业本了，所以他没有完成作业。
xiǎo míng wàng jì dài zuò yè běn le， suǒ yǐ tā méi yǒu wán chéng zuò yè。
Xiaoming forgot to bring his homework book, so he didn't finish the homework.
妈妈忘记买菜了，所以晚饭没做好。
mā ma wàng jì mǎi cài le， suǒ yǐ wǎn fàn méi zuò hǎo。
Mom forgot to buy vegetables, so dinner wasn't ready.
小红忘记关窗户了，结果晚上有点冷。
xiǎo hóng wàng jì guān chuāng hù le， jié guǒ wǎn shàng yǒu diǎn lěng。
Xiaohong forgot to close the window, and it was a bit cold in the evening.
爸爸忘记带钥匙了，所以他回家晚了。
bà ba wàng jì dài yào shi le， suǒ yǐ tā huí jiā wǎn le。
Dad forgot his keys, so he got home late.
小华忘记做作业了，结果被老师批评了。
xiǎo huá wàng jì zuò zuò yè le， jié guǒ bèi lǎo shī pī píng le。
Xiaohua forgot to do his homework, and as a result, he was criticized by the teacher.
Mini dialogue
别忘了带水壶
A
别忘了带水壶。
Bié wàng le dài shuǐhú.
Don't forget to bring your water bottle.
B
好的，我不会忘。
Hǎo de, wǒ bù huì wàng.
Okay, I won't forget.
忘记生字了
A
这个字怎么写？我忘了。
Zhège zì zěnme xiě? Wǒ wàng le.
How do you write this character? I forgot.
B
没关系，我们一起查字典。
Méiguānxi, wǒmen yīqǐ chá zìdiǎn.
No worries, let's look it up in the dictionary together.
Related words and contrasts
opposite
记得
jìde
remember
忘 means forget, 记得 means remember.
similar
忘记
wàngjì
forget
忘 and 忘记 are often interchangeable, but 忘记 is slightly more formal.