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英语语法时态 I thought you must have known that I ____ (be) happy

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英语语法时态 I thought you must have known that I ____ (be) happy when you ____ (say) "con...
英语语法时态 I thought you must have known that I ____ (be) happy when you ____ (say) "congratulations" to me!
was ; said
再问: 为什么不可以用had been
再答: 根据语境判断,that 引导的宾语从句是对过去的一般性描述,所以,应该用一般过去时态。