后面直接接名词宾语时:
claim和demand的意思是“索要”。前者一般用于索赔等场合,后者则是一种强势的、咄咄逼人的索要。require的意思是“需要”、“要求”,不是描述一种行为,而是一种事实上的需求。
例如:
The customer claimed a refund.
The boss demanded an apology from me.
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后面接宾语从句时:
claim的意思有变化,变成了“声称”。另外二者意思不变。注意后两者的宾语从句要用虚拟语气,即动词用原形(或前面加should)。
例如:
The doctor claimed that his medicines were effective.
The boss demanded that I make an apology.
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demand和require还可以用v sb to do sth的句型:
The boss demanded me to make an apology.
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