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Chinese grammar - Simultaneous actions ('while') with 在 or 当...的时候 (zài/dāng...de shíhou)

Simultaneous actions ('while') with 在 or 当...的时候 (zài/dāng...de shíhou)

The Chinese structures ...的时候 (zài...de shíhou) and ...的时候 (dāng...de shíhou) are used to indicate that an action or state occurred simultaneously with another action or state.

Both structures translate to 'when' or 'while' in English, but they can also mean 'during the time of' or 'at the time of'.

Examples:
在我做饭的时候,他在看电视。
zài wǒ zuòfàn de shíhou,#tā zài kàn diànshì.
While I was cooking, he was watching TV.
在他工作的时候,我们在玩。
zài tā gōngzuò de shíhou,#wǒmen zài wán.
While he was working, we were playing.
当我学习的时候,弟弟在睡觉。
dāng wǒ xuéxí de shíhou,#dìdi zài shuìjiào.
While I was studying, my younger brother was sleeping.
在你开车的时候,我在看风景。
zài nǐ kāichē de shíhou,#wǒ zài kàn fēngjǐng.
While you were driving, I was looking at the scenery.

风景 (fēngjǐng) means 'scenery' or 'landscape'

在我打电话的时候,妈妈在做饭。
zài wǒ dǎ diànhuà de shíhou,#māma zài zuòfàn.
While I was making a call, mom was cooking.
当他们玩游戏的时候,我在工作。
dāng tāmen wán yóuxì de shíhou,#wǒ zài gōngzuò.
While they were playing games, I was working.
当我们上课的时候,外面下雨了。
dāng wǒmen shàngkè de shíhou,#wàimiàn xiàyǔ le.
While we were in class, it started raining outside.

外面 (wàimiàn) means 'outside'

当她打扫房间的时候,弟弟在看书。
dāng tā dǎsǎo fángjiān de shíhou,#dìdi zài kànshū.
While she was cleaning the room, my younger brother was reading.
在我们旅行的时候,他在家。
zài wǒmen lǚxíng de shíhou,#tā zài jiā.
While we were traveling, he was at home.
在外面有暴风雨的时候,我们待在里面。
zài wàimiàn yǒu bàofēngyǔ de shíhou,#wǒmen dāizài lǐmiàn.
While there was a storm outside, we stayed inside.

暴风雨 (bàofēngyǔ) means 'storm'

待在 (dāi zài) means 'stay in'

里面 (lǐmiàn) means 'inside'

在她上网的时候,他在打游戏。
zài tā shàngwǎng de shíhou,#tā zài dǎ yóuxì.
While she was surfing the internet, he was playing games.
当我们游泳的时候,爸爸在看书。
dāng wǒmen yóuyǒng de shíhou,#bàba zài kànshū.
While we were swimming, dad was reading.