The book is so dear that i can't buy it(变简单句)

The book is so dear that i can't buy it(变简单句) The computer is so expensive that I can't buy it.（改为简单句） it is so expensive a T-shirt that I can not buy it (同义句改写） i English is so difficult that I can't learn it well.(改为简单句) The book is so helpful that I want to buy it.that的用法?什么成分? The jacket is so samll that i can't wear it同义句改写 the jacket The camera is so expensive that I can't afford it.的同义句是什么 The question is so difficult that I can't answer it(改为同义句) the question is so difficult that I can't answer it.同义句 The box is so heary that I can't carry it.{改为同义句} The camera is so expensive that I can't afford it（改为同义句） The problem is so difficult that I can't work it out.同义句