1.用作動詞時，為及物動詞，表示「冒……的危險」「使遭受危險」。如：
they risk their lives in order that we may live more safely.他們冒了生死危險使我們生活得更安全。
後接動詞作賓語時，要用動名詞，不能用不定式。
擴展資料。
如：
they risked losing everything.他們冒失去一切的危險。
a lot of people run the risk of being killed.許多人冒著被殺害的危險。
2.用作名詞時，注意以下用法：
(1)要表示冒危險，通常與動詞run,take等搭配。如：
why run the risk?為什麼要冒這種危險？
there was so much to lose (that) we couldn』t take any risks.損失這麼多，我們不能冒任何風險了。
(2)表示「……的危險」，其後通常不接不定式，而接of doing sth。如：
he dare not run [take] the risk of being caught by the police.他不敢冒被警察抓住的危險。
there’s not much risk of losing money if you bet on that horse.如果你押那匹馬，輸錢的`風險不太大。
比較run [take] the risk of doing sth與run [take] a risk in doing sth：前者指冒做某事的危險或風險，其中的of doing sth為修飾the risk的定語；後者指做某事有危險或冒風險，其中的in doing sth是狀語，in有類似when的含義。如：
i took a risk in telling him the news at that moment.我那時把消息告訴他，那是冒了風險的。
(3)注意以下習語的用法：
①at risk 處境危險，在危險中。
how much at risk is the smoker?吸煙者的危險性有多大。
②at one’s own risk 對發生的事負責，自擔風險。
persons swimming beyond this point do so at their own risk.游泳者超越此界限若有意外後果自負。
③at the risk of 冒……的危險。
he saved my life at the risk of losing his own.他冒著生命危險救了我的性命。
they risk their lives in order that we may live more safely.他們冒了生死危險使我們生活得更安全。
後接動詞作賓語時，要用動名詞，不能用不定式。
擴展資料。
如：
they risked losing everything.他們冒失去一切的危險。
a lot of people run the risk of being killed.許多人冒著被殺害的危險。
2.用作名詞時，注意以下用法：
(1)要表示冒危險，通常與動詞run,take等搭配。如：
why run the risk?為什麼要冒這種危險？
there was so much to lose (that) we couldn』t take any risks.損失這麼多，我們不能冒任何風險了。
(2)表示「……的危險」，其後通常不接不定式，而接of doing sth。如：
he dare not run [take] the risk of being caught by the police.他不敢冒被警察抓住的危險。
there’s not much risk of losing money if you bet on that horse.如果你押那匹馬，輸錢的`風險不太大。
比較run [take] the risk of doing sth與run [take] a risk in doing sth：前者指冒做某事的危險或風險，其中的of doing sth為修飾the risk的定語；後者指做某事有危險或冒風險，其中的in doing sth是狀語，in有類似when的含義。如：
i took a risk in telling him the news at that moment.我那時把消息告訴他，那是冒了風險的。
(3)注意以下習語的用法：
①at risk 處境危險，在危險中。
how much at risk is the smoker?吸煙者的危險性有多大。
②at one’s own risk 對發生的事負責，自擔風險。
persons swimming beyond this point do so at their own risk.游泳者超越此界限若有意外後果自負。
③at the risk of 冒……的危險。
he saved my life at the risk of losing his own.他冒著生命危險救了我的性命。