请帮我解析一下这句英文谢谢
问题描述：
请帮我解析一下这句英文谢谢
The roads are very difficult to ride on.
问:可转换为It is very difficult to ride on the roads.
麻烦帮我分析句子成分，原句中to ride on 是做真正主语还是目的状语。
答
请注意are 在这里是be动词,very difficult to ride on 是表语.
to ride on 是不定式短语 用来修饰 ,very difficult 的,是表语补足语
记住这个句型主系表结构,而不是主谓宾结构!它的动词are 是系动词!