安全 + Noun / Subject + 很 + 安全
安全 (ānquán) means 'safe' or 'safety' and can function as both an adjective and a noun. As an adjective it describes the absence of danger; as a noun it refers to the concept of security. For example, 安全通道 means 'safe passage.'
孩子们过马路的时候一定要注意安全。
háizimen guò mǎlù de shíhou yīdìng yào zhùyì ānquán.
Children must pay attention to safety when crossing the street.
这个小区的安全措施做得非常好。
zhège xiǎoqū de ānquán cuòshī zuò de fēicháng hǎo.
The safety measures in this residential complex are very well done.
你一个人晚上出门安全吗?
nǐ yī ge rén wǎnshang chūmén ānquán ma?
Is it safe for you to go out alone at night?