Question

15．应该做出决定不允许在室内抽烟．
A decision shouldbe made not to allow smoking indoors．

Answer 1

分析 be made not to allow smoking．

解答 答案：be made not to allow smoking．表示做决定做某事用make a decision to do sth．否定就是做决定不做某事make a decision not to do sth主语是a decision，是make 的承受者，构成被动语态，加上前面的情态动词should，这里用情态动词的被动语态---情态动词+be+过去分词，make的过去分词made，故be made not to，允许做某事allow doing sth，吸烟smoke，去e加ing，故答案是be made not to allow smoking．

点评 这里是情态动词被动语态的构成，理解掌握各种类型的被动语态，要学会分析主谓关系．