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请问It is a time 后面只能加when吗?that行吗?由the same 修饰的先行词在定语从句中,as和that都能做先行请问It is a time 后面只能加when吗?that行吗?由the same 修饰的先行词在定语从句中,as和that都能做先

题目详情
请问It is a time 后面只能加when吗?that行吗?由the same 修饰的先行词在定语从句中,as和that都能做先行
请问It is a time 后面只能加when吗?that行吗?
由the same 修饰的先行词在定语从句中,as和that都能做先行词吗?怎么区分?
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答案和解析
It is a time 里面的a time是表示“一个时期/时代”的意思,从考点来分析,后面更多是接一个由when/in which/ during which引导的定语从句.如:
It is a time when we communicate through cellhphones instead of letters.
It is a time when children honour their mothers with cards,gifts and flowers
由that来引导一个定语从句,我目前还没有看过,因为先行词是a time表示时间的,与关系代词that无关.
由the same 修饰的先行词在定语从句中,as和that都可以用来引导定语从句,不是做先行词.只是意思有点不同.如:
This is the same pen as I lost yesterday.这笔和我昨天丢的那支是一样的.(表示同类)
This is the same pen that I lost yesterday,这就是我昨天丢的笔.(表示同一个)
一般我们更多地是讲:先行词由the same来修饰,关系代词用as,而忽略了第二点.