他闻了又闻，还是什么都没闻到。
He smelled and smelled, and still didn't smell anything.
tā wén le yòu wén，háishì shíyāo dū méi wéndào 。
Advanced use of "you"
Subj. ＋Verb + 了 + 又 + Verb，还是 / 就是 ……
More from Chinese Grammar HSK 5
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