他用口头禅形容自己的生活态度。

tā yòng kǒutóu chán xíngróng zìjǐ de shēnghuó tàidù.

He uses verbal clichés to describe his attitude towards life.

这只是口头协议，还需要签合同才能生效。

Zhè zhǐshì kǒutóu xiéyì, hái xūyào qiān hétóng cái néng shēngxiào.

This is only a verbal agreement; we still need to sign a contract for it to take effect.

老师给了我一个口头警告。

Lǎoshī gěi le wǒ yí gè kǒutóu jǐnggào.

The teacher gave me a verbal warning.