The book is difficult to understand 的to做什么成分

The book is difficult to understand 的to做什么成分 the book is difficult to read里面的不定式做什么成分 This book is difficult for you to read.中的to read做什么成分? The woman is difficult to understand This book is difficult to understand.改为同义句 The book is difficult for you to understand.不定式表主动/被动? to与for区别:The book is difficult to me.The book is difficult f 请问The question is difficult to answer.这个句子中,to answer作什么成分? Such a book ______ you showed me is difficult to understand. .Such a book ______ you showed me is difficult to understand why is BBC so difficult to understand? which letter is difficult to understand