Tā bǎ yú'ěr guà zài yúgōu shàng, ránhòu bǎ xiàn pāo chūqù.
He put bait on the fishhook and then cast the line out.
Nà tiáo yú tūn xià le yúgōu.
The fish swallowed the fishhook.
Zhè gēn yúgōu tài xiǎo le, diào buliǎo dà yú.
This fishhook is too small to catch big fish.