关于新概念二课文中某个语法的不理解新概念二中的65课有这么一句,He set off down the main street of the city riding a bay elephant called Jumbo.这个地方为什么用riding呢,是动名词还是现在分词,越详细越好,

关于新概念二课文中某个语法的不理解新概念二中的65课有这么一句,He set off down the main street of the city riding a bay elephant called Jumbo.这个地方为什么用riding呢,是动名词还是现在分词,越详细越好,
关于新概念二课文中某个语法的不理解
新概念二中的65课有这么一句,He set off down the main street of the city riding a bay elephant called Jumbo.
这个地方为什么用riding呢,是动名词还是现在分词,越详细越好,我会追加分的.
请回答得详细点，最好在网上找到比较全面的语法介绍，有例句的那种，我是不懂语法，

关于新概念二课文中某个语法的不理解新概念二中的65课有这么一句,He set off down the main street of the city riding a bay elephant called Jumbo.这个地方为什么用riding呢,是动名词还是现在分词,越详细越好,
现在分词
前面省略了一个逗号,是伴随状语.
在一个句子的最后+现在分词形式的伴随状语,起类似于副词的修饰作用.

用riding是伴随状语 主要就是riding这个动作伴随着set off down

用rid在一个句子的最后+现在分词形式的伴随状语，起类似于副词的修饰作用。ing是伴随状语 主要就是riding这个动作伴随着set off down

riding：一般过去进行时 : 跟过去的一个时间或动作同时发生
间接引语
如果是现在进行时在直接引语当中变成间接引语, 极有可能选用过去完成时
可以试着完成
1.My brother____while he____his bicycle and hurt himself.
A.fell/was riding B.feel/was riding<...

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riding：一般过去进行时 : 跟过去的一个时间或动作同时发生
间接引语
如果是现在进行时在直接引语当中变成间接引语, 极有可能选用过去完成时
可以试着完成
1.My brother____while he____his bicycle and hurt himself.
A.fell/was riding B.feel/was riding
C.had fallen/rode D.had fallen/was riding
fell(跌下来),ride(骑自行车) A
2.He____his leg as he_____in a football match.
A.broke/played B.was breaking/was playing
C.broke/was playing D.was breaking/played
break one's leg C
3.My father will be here tomorrow.
I thought that he____today.
A.was coming B.is coming
C.will come D.comes A
be coming表示将要
go/come/leave/arrive的过去进行时态很有可能表达过去将来时态的含义
跟go/come/leave/arrive相连的词一定会用进行时态表示将来时态
4.Jack was going out of the shop when he collided with an old woman
who____
A.come B.was coming
C.had been coming D.had come
collide : 相撞, 是相对概念 B
5.Mike couldn't come to the telephone when Mr.Smith called her because
she___C__in the lab.
A.had been working B.has been working
C.was working D.worked

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