safe和safety和safely的区别：含义不同、词性及用法不同。safe可作名词和形容词，含义有“处境安全、未受伤害、保险箱”；safety只作名词，含义为“安全、无危险、安全处所”；safely只作副词，含义为“未受损伤、无危害地”等。
一、safe的含义及用法
1、作为形容词时，意为处境(或情况)安全;不损害(或危害)健康的;安全的;未受伤害(或未遭损害、未丢失等)。
例句：The children are quite safe here.
孩子们在这里十分安全。
The street is not safe for children to play in.
孩子在大街上玩不安全。
We were glad she let us know she was safe.
她告诉我们她平安无事，我们很高兴。
We all want to live in safer cities.
我们都希望住在比较安全的城市里。
2、作为名词时，意为保险箱;保险柜。
例句：The files are now in a safe to which only he has the key.
文件目前放在一个只有他才能打开的保险柜里。
She locked her passport and money in the safe.
她把自己的护照和钱锁在了保险柜里。
二、safety的含义及用法
safety作为名词，意为安全;平安;安全性;无危险;安全处所。
例句：He was kept in custody for his own safety .
拘押他是为了他本人的安全。
I'm worried about the safety of the treatment.
我担心这种疗法是否安全。
We watched the lions from the safety of the car.
我们从车里看狮子，很安全。
There is grave concern for the safety of witnesses...
人们非常担心证人的安全。
三、safely的含义及用法
safely作为副词，意为未受损伤(或损坏);未丢失;安全地;无危害地;不大可能出错地;有把握地。
例句：The plane landed safely.
飞机安全降落。
The bomb has been safely disposed of.
炸弹已安全处理。
We can safely say that he will accept the job.
我们可以有把握地说，他会接受这份工作。
I thought the kids were safely tucked up in bed.
我以为孩子们好好地在床上睡觉呢。
