So, using this kind of structure has a similar function to the AA pattern. It can lighten the mood and seriousness of the question. It also adds variety to sentence structure. So trying to use this structure can make your expression more flexible. So, the sentence structure is: Verb + “一” +Verb Example: 我想闻一闻这朵花。| wǒ xiǎng wén yī wén zhè duǒ huā | I want to smell this flower.