Subject + 摇 + Object
The verb 摇 (yáo) means "to shake" or "to sway" and describes a back-and-forth movement. It can be used for shaking one's head, waving, or rocking. When repeated as 摇摇, it conveys a brief or casual shaking motion.
风把树枝摇得沙沙响。
Fēng bǎ shùzhī yáo de shāshā xiǎng.
The wind shook the branches, making them rustle.
别摇桌子,我在写字呢。
Bié yáo zhuōzi, wǒ zài xiězì ne.
Don't shake the table; I'm writing.
她摇了摇手中的瓶子。
Tā yáo le yáo shǒuzhōng de píngzi.
She shook the bottle in her hand.