他高兴极了！

Tā gāoxìng jí le!

He is extremely happy!

我要宣布一件极重要的事情。

Wǒ yào xuānbù yí jiàn jí zhòngyào de shìqing.

I must make a very important announcement.

这简直是好极了！

Zhè jiǎnzhí shì hǎo jí le!

This is simply wonderful!