warn against(v.+prep.)
告诫或者提醒不要/当心/提防advi sb to avoid sb/sth or doing sth
自闭症的表现症状都有哪些
▲warn sb against sb/sth/v-ing
He warned me against pickpockets.他警告我提防扒手。
The doctor warned the patient against smoking.医生告诫病人不要吸烟。
They warned him against swimming in that part of the river.
他们告诫他不要在这一带河里游泳。
She warned me against being overconfident.她告诫过我不要过于自信。
◇用于be ～ed结构
I was once warned against him.曾经有人警告我要提防他。
I've been warned against that company, so I'll take a job somewhere el.
我曾被告诫要提防那个公司，因此我将在别处找工作。
He was warned against trying to get through here.
有人警告过他，不要想从这里通过。
Have they been warned against doing that?有人告诫过他们别这样做吗?
warn of(v.+prep.)发出关于…的警告give a warning about
▲warn of sth They warned of an approaching snowstorm.海参跟什么煲汤最好
他们发出将有暴风雪到来的警告。
The motoring organization is warning of thick mist and blowing snow on high ground.机动车组织发出高地将出现浓雾和风雪的警告。
▲warn sb of sth ◇用于be ～ed结构
They were warned of the approach of the enemy.有人告诉他们，敌人来了。They had been warned of the danger.曾有人告诉过他们，有危险。
The town's people have been warned of a possible earthquake.
什么什么圆睁
镇上的居民预先得到通知说可能有地震。
warn off 1(v.+adv.)
▲warn sb⇔off1.阻止…去(某处) try to prevent sb from going somewhere or doing sth, especially by threatening them
Anne witnesd her boss bribing the tax collector.She wanted to report him, but her husband warned her off.
爸爸驾到安妮目睹了她的老板贿赂税务员。她想告发他，但她丈夫制止了她。
2.不许…上前tell sb to keep away, prohibit from advancing, trespassing, intruding, etc.
When we tried to enter the hou, some men warned us off.我们想进入房子时有几个人叫我们走开。
The road was clod to traffic after the accident, and the police were warning everyone off.事故发生后，那条路禁止通行，警察不让任何人到那里去。
大自然的故事
板凳的英文We wanted to have a picnic in the woods, but a large notice warned us off.我们
想在树林里野餐，可是一张很大的布告不许我们进入树林。
◇用于be ～ed结构
中国十大宜居城市
The children ud to be allowed on the farm, but they've been warned off since one of them let the cows out.那些孩子们过去常被允许进入农场，但自从其中的一个孩子把牛放跑后，便不让他们进去了。
情商管理
The rider was found guilty of giving the hor drugs, and was warned off for a year.人们发现那位骑手让马服用兴奋剂，因而取消其比赛资格一年以示惩罚。
warn off2(v.+prep.)不许靠近tell to keep away prohibit from advancing, trespassing, intruding, etc.
▲warn sb off sth The police have put up signs to warn people off this area.
警方已竖起了标示牌，告诫人们不要靠近这一地区。
He realized that his doctor was warning him off drink.
他意识到医生在告诫他戒酒。
