1. 形容詞
   勢在必行的, 必要的
   必須的
   極重要的
   緊急的
   急需的, 迫切的
   急迫的, 急切的
   命令式的, 必須服從的
   專橫的
   祈使法的
   (主詞限定it)imperative that ...(完整句):
   

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   同義字詞
   compulsory,forced,incumbent,involuntary,mandatory,necessary,nonelective,obligatory,peremptory,required
   all-important,critical,essential,indispensable,integral,must-have,necessary,necessitous,needed,needful,required,requisite,vital
   acute,burning,compelling,critical,crying,dire,emergent,exigent,imperious,importunate,instant,necessitous,pressing,urgent
   

2. 名詞
   必須履行的責任, 需要
   命令, 誡命
   規律
   祈使語氣動詞
   /以上複數為"imperatives"/
   限定不可數名詞:
   祈使語氣
   

   同義字詞
   behest,charge,command,commandment,decree,dictate,direction,directive,do,edict,injunction,instruction,order,word
   burden,charge,commitment,duty,incumbency,need,obligation,office,responsibility
   

例句

1. But surely there is an imperative to rush.
2. The imperative mood is used to issue orders.
3. These, admittedly, are absolutely imperative .
4. It is imperative that a child be taught to obey.
5. There was nothing between rhetoric and imperative .
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