作业帮英语语法it is the time of the year at which relatives and friends exchange visits 句子成分it is the time of the year at which relatives and friends exchange visits.句子成分 it是形式主语吗?at which 怎么讲
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英语语法it is the time of the year at which relatives and friends exchange visits 句子成分it is the time of the year at which relatives and friends exchange visits.句子成分 it是形式主语吗?at which 怎么讲
英语语法it is the time of the year at which relatives and friends exchange visits 句子成分
it is the time of the year at which relatives and friends exchange visits.句子成分 it是形式主语吗?at which 怎么讲
英语语法it is the time of the year at which relatives and friends exchange visits 句子成分it is the time of the year at which relatives and friends exchange visits.句子成分 it是形式主语吗?at which 怎么讲
it 不是形式主语,就是这句话里的主语,句子主干就是It is the time. 然后用后面的定语从句修饰这里的time,其实应该是两句话：
It is the time. relatives and friends exchange visits at the time.
合并成一句,第一句中的time称为先行词,用关系代词which 来指代time,合并为：
It is the time at which / that relatives and friends exchange visits at. (这里用at是说在这个时间)
at可以放前面,变成at which,而不能为at that,另外也可以把 at which 变为 when,就变成：
It is the time when relatives and friends exchange visits.
希望以上解释能帮助你理解!
翻译为：这是每年亲戚和朋友互访的时候,
it可以指代时间，天气 不是形式主语 at which中which替代"the time of the year " at which合起来相当于“when” 引导定语从句
这是一年亲戚朋友们互相拜访的时间。
it（主语） is（谓语） the time of the year（表语） at which relatives and friends exchange visits（at which)引导定语从句修饰the time of the year.it是指示代词，表示“这”，at which是介词提前的定语从句。
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这是一年亲戚朋友们互相拜访的时间。
it（主语） is（谓语） the time of the year（表语） at which relatives and friends exchange visits（at which)引导定语从句修饰the time of the year.it是指示代词，表示“这”，at which是介词提前的定语从句。
祝你学习进步，更上一层楼！ (*^__^*)
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it就是指的后面的time，at which 是属于介词+which引导的定语从句
it主语，the time of the year 是表语，后面引导的是定语从句，定从中relatives and friends 是主语
这句话的中文是：这是亲戚们和朋友们相互拜访的时间
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这是一年中亲朋好友互相拜访的时间。
at which 后面是定语从句。it是无人称代词，指时间。不是形式主语。