Subject + 扔进 + Place
扔进 (rēngjìn) is a directional verb compound meaning "to throw into," formed by 扔 (to throw) and the directional complement 进 (into). It describes the action of tossing something or someone into a container or enclosed space, as in 被扔进地牢 (was thrown into a dungeon).
她生气地把信扔进了垃圾桶。
Tā shēngqì de bǎ xìn rēngjìnle lājītǒng.
She angrily threw the letter into the trash can.
孩子们把石头扔进了河里。
Háizimen bǎ shítou rēngjìnle hé lǐ.
The children threw stones into the river.
他把脏衣服扔进洗衣机就出门了。
Tā bǎ zāng yīfu rēngjìn xǐyījī jiù chūmén le.
He threw the dirty clothes into the washing machine and went out.