Often did we warn them not to do so

Often did we warn them not to do so am sorry,I did not mean to do so!The reality is not what we warn sb not to do warn sb against doing 可互换吗 英语翻译是用warn sb.about sth.还是warn sb.not to do ask,tell,want,warn,sb（not） to do sth 用warn sb.not to do sth.造句 与warn sb （not ）to do的类似用法 warn sb not to do 的英语解释句子是? Typhoons often cause floods so people do not like them very we do not think it is right ( to do so ) so much homework did we have to do that we had no time to ta The way we can tell them to do as we do,not just do as we sa