The preposition 当着
We use the preposition 当着 
to emphasize that an action is performed in front of someone.
to emphasize that an action is performed in front of someone.Scheme
当着
person
action
Examples
当着他说话
To say (something) to his face
dāngzhe tā shuō huà
当着外人吵嘴
To argue in front of strangers
dāngzhe wàirén chǎozuǐ
We usually use 当着 in the construction 当着…的面
Scheme
当着
person
的面
action
Examples
不要当着我的面讨论这个问题
Don't discuss this in front of me
bú yào dāngzhe wǒ de miàn tǎolùn zhè ge wèntí
她父母从来不当着孩子们的面吵架
Her parents never fought in front of their children
tā fùmǔ cónglái bù dāngzhe háizimen de miàn chǎojià
你在当着我的面说谎
You are lying to my face
nǐ zài dāngzhe wǒ de miàn shuōhuǎng
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