danger的用法
1.泛指一般意义的“危险”,通常是不可数名词.表示做某事的危险或发生某情况的危险等,通常后接of (doing) sth,而不接不定式.如：
Is there any danger of fire (infection)?有发生火灾的(感染)的危险吗?
The children didn’t realize the danger of swimming in the river.孩子们没有意识到在这河里游泳的危险.
注意通常不说……the danger to swim in the river.
比较以下后接 in doing sth 的句型：
Is there any danger in climbing the tree?爬这树有危险吗?
用于短语 in danger (of),意为“在危险中”.如：
His life is in danger.他有生命危险.
He is in danger of losing his life.他有生命危险.
We’re in danger of being hit by a stone.我们有被石头砸的危险.
2.表示具体意义的造成危险的原因或人(物)等,或指威胁、危害等.是可数名词.如：
He is a danger to society.他对社会是个危险人物.
Do you know the dangers of smoking?你知道吸烟的危害吗?
二、dangerout的用法
1.表示“危险的”,指本身对他人或他物有危险.如：
The dog looks dangerous.这狗看来有(咬人的)危险.
It’s a dangerous bridge.那是座危险的桥.
比较：
The man is dangerous.这人很危险.(即对他人造成危险)
The man is in danger.这人有危险.(即自己处于危险中)
2.可用于 It’s dangerous for sb to do sth,但不用于 Sb isdangerous to do sth 或后接 that 从句.如：
人们在这条河里游泳很危险.
误：It’s dangerous that people swim in the river.
误：People are dangerous to swim in the river.
正：It’s dangerous for people to swim in the river.
比较：The river is dangerous to swim in.(正)
The river is dangerous for swimmers.(正)
endangered形容词
1.adj.
（生命等）有危险的,有灭绝危险的,将要绝种的(形容动植物濒临灭绝) endangered species
