听到这个好消息，他高兴极了。

Tīngdào zhège hǎo xiāoxi, tā gāoxìng jí le.

When he heard this good news, he was extremely happy.

外面冷极了，你出门一定要多穿点衣服。

Wàimiàn lěngjí le, nǐ chūmén yídìng yào duō chuān diǎn yīfu.

It's extremely cold outside; you must wear more clothes when you go out.

孩子们累极了，一回家就睡着了。

Háizimen lèi jíle, yì huíjiā jiù shuìzháo le.

The children were extremely tired and fell asleep as soon as they got home.