we have been there a couple of times!a couple of times 在句子中充当什么成分?

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• we have been there a couple of times!a couple of times 在句子中充当什么成分?
• we have been prepared to do (whatever) it takes to save her life.为什么用whateverwhaterver在句子中充当宾语和什么语
• we have been there a couple of times!a couple of times 在句子中充当什么成分?
• 形容词性物主代词加名词的用法eg:1.it happened prior to my arrival.2.after his arrival ,we have a party.这两句中的"my arrival","his arrival"在句子中充当什么成分?该怎么翻译?请帮忙再举出一些类似的例子.平时我该怎么运用这种表达法?是否可以改写成："after he arrived,we have a party"这句话是否正确？与after his arrival ,we have a party.的表达有什么区别？
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