亲眼 + Verb of Perception
The adverb 亲眼 (qīnyǎn) means "with one's own eyes" or "personally witnessing." It emphasizes that someone directly observed something rather than hearing about it secondhand. It is typically placed before verbs of perception like 看见 or 目睹.
我亲眼看见他把钱包捡起来还给了失主。
Wǒ qīnyǎn kànjiàn tā bǎ qiánbāo jiǎn qǐlái huán gěi le shīzhǔ.
I saw with my own eyes him pick up the wallet and return it to its owner.
这件事我没有亲眼见过,不好评论。
Zhè jiàn shì wǒ méiyǒu qīnyǎn jiàn guò, bù hǎo pínglùn.
I haven't seen this matter with my own eyes, so I'd rather not comment.
她亲眼看到了日出的那一刻,感动得哭了。
Tā qīnyǎn kàn dào le rìchū de nà yí kè, gǎndòng de kū le.
She saw the moment of sunrise with her own eyes and was moved to tears.