Subject + 闭上 + 眼睛/嘴
闭上 (bìshàng) means "to close" and is specifically used for closing eyes or mouth. The directional complement 上 indicates the completion of the closing action, as in 闭上眼睛 (to close one's eyes).
闭上眼睛,深呼吸,放松一下。
Bì shàng yǎnjīng, shēn hūxī, fàngsōng yīxià.
Close your eyes, take a deep breath, and relax.
她闭上嘴巴,不想再争论了。
Tā bì shàng zuǐba, bù xiǎng zài zhēnglùn le.
She closed her mouth, not wanting to argue anymore.
你先闭上眼睛,我有个惊喜给你。
Nǐ xiān bì shàng yǎnjīng, wǒ yǒu gè jīngxǐ gěi nǐ.
Close your eyes first — I have a surprise for you.