定语从句关联词who which 后面什么时候接is,have 等动词只需要说明白举例子就行,不用长篇复制我的意思是为什么我看到有的定语从句的关系词后面有is was have等动词,有的时候关系词后面没有呢

定语从句关联词who which 后面什么时候接is,have 等动词只需要说明白举例子就行,不用长篇复制我的意思是为什么我看到有的定语从句的关系词后面有is was have等动词,有的时候关系词后面没有呢
定语从句关联词who which 后面什么时候接is,have 等动词
只需要说明白举例子就行,不用长篇复制
我的意思是为什么我看到有的定语从句的关系词后面有is was have等动词,有的时候关系词后面没有呢

定语从句关联词who which 后面什么时候接is,have 等动词只需要说明白举例子就行,不用长篇复制我的意思是为什么我看到有的定语从句的关系词后面有is was have等动词,有的时候关系词后面没有呢
is作系动词后面描述状态,定义,
如这个非限制性定语从句：
Charles Smith,who was my former teacher,retired last year.
All that is needed is a supply of oil.
have用语完成时的时候,可与be动词连用,也可与动词连用.
如：Charles Smith,who has retired last year,was my former teacher.（完成时）
Charles Smith,who has been in school for 40 years,was my former teacher.(描述)
当然定语从句都是进一步阐述被强调部分的作用.
这没有固定的规则,定语从句关系词就代表你句子中或从句中要强调的部分,比如：
That is the man who wanted to meet you.
句中who=the man,可以写成A man wanted to meet you.And that is the man.
每个定语从句都可以拆成两个独立句子.有的定语从句是主系表结构,关系词后面就是系动词is,was等,有的从句是主谓宾结构,后面就直接跟谓语动词了.有的时候被强调部分在从句中不是主语,需要转换句式,如：
Beijing is the place where (in which) I was born.
=Beijing is a place.I was born there (in Beijing).

看先行词在从句中充当什么成分,根据先行词来..
比如..You are the person who have asked the question..you充当从句中的主语.

取决于前面的定语是复数还是单数.是复数谓语动词也用复数 是单数谓语动词用单数.
例：the man who／which is in red shirt is her brother.
如果是不可数名词 用单数
the price of the rice which is imported from Thailand is very high.
如果是集合名词 用复数...

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取决于前面的定语是复数还是单数.是复数谓语动词也用复数 是单数谓语动词用单数.
例：the man who／which is in red shirt is her brother.
如果是不可数名词 用单数
the price of the rice which is imported from Thailand is very high.
如果是集合名词 用复数 如 people,family
例：do you know those people who are standing there ?
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这要看后面需要的是实意动词或助动词do 还是be动词,往往因表达的意思而定.
比如上面三个例子,"需要用be动词.下面的例子要用do既have只类的:
this girl who played the main role in that film got "the best actress"[在那部电影里扮演女主角的那个女孩得到了"最佳女主角"] 扮演角色要用 "play" .属于do类/

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