非谓语动词前面有时也可以有when after before 之类的介词 那什么时候可以省略啊
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非谓语动词前面有时也可以有when after before 之类的介词 那什么时候可以省略啊
首先亲要确定的是when不是介词 when疑问副词、从属连词(名词性从句和状语从句中)、关系副词(定语从句中)
当before 和 after 用作介词时,其 后可以跟非谓语动词(动名词doing)
而当这三个词出现楼主所说的省略这一语法现象时,三者都是从属连词,引导一时间状语(不省略则称作时间状语从句)
例如:When water is heated,water can boil./When heated,water can boil.
When he was playing upstairs,a stranger came to visit his home.
When he was playing upstairs,he broke his buttock.
/When he playing upstairs,a stranger came to visit his home.(从句与主句主语不一致时,从句主语不可省)
/When playing upstairs,a stranger came to visit his home.(从句与主句主语一致时,从句主语谓语可省)
此种愈发现象叫做省略,句法作用不变,仍是状语;名称上,这种没有谓语又能单独表达一个分句的意思的结构叫做独立结构或独立主格结构.涵盖范围很广,基本上状语从句都能转化.此处不赘言了.
当before 和 after 用作介词时,其 后可以跟非谓语动词(动名词doing)
而当这三个词出现楼主所说的省略这一语法现象时,三者都是从属连词,引导一时间状语(不省略则称作时间状语从句)
例如:When water is heated,water can boil./When heated,water can boil.
When he was playing upstairs,a stranger came to visit his home.
When he was playing upstairs,he broke his buttock.
/When he playing upstairs,a stranger came to visit his home.(从句与主句主语不一致时,从句主语不可省)
/When playing upstairs,a stranger came to visit his home.(从句与主句主语一致时,从句主语谓语可省)
此种愈发现象叫做省略,句法作用不变,仍是状语;名称上,这种没有谓语又能单独表达一个分句的意思的结构叫做独立结构或独立主格结构.涵盖范围很广,基本上状语从句都能转化.此处不赘言了.
非谓语动词前面有时也可以有when after before 之类的介词 那什么时候可以省略啊
谓语动词和非谓语动词谓语动词是不是 前面的句子中有主语,没动词的时候后面可以加谓语动词.而非谓语动词就是前面的句子有主语
定语从句中 引导词如果是 非谓语动词 或者是介词宾语时 引导词也可以省略吗?
home要省略介词.那若是home前有一个单词,且不是副词,那么home前面的单词的前面可以加介词吗?
不及物动词+介词后+非谓语动词可以吗?
请问星期几前面的介词on也可以省略吗?
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