it is worthwhile that这个句型后面的that从句部分需要使用虚拟语气吗?

英语翻译It is definitely worthwhile. It is both worthwhile and reward改错 It is both worthwhile and ___(reward). It is worthwhile reading this novel again.wortIt is worthwhile reading this novel again.worthwhile可以用wirthy of 为什么? 是it is worth while还是it is worthwhile对? 英语翻译It iS worthwhile —— —— the topic The book is worthwhile reading.The book is worth reading.可以写成It's worth reading the book.同理：It's worthwhile reading/to read the book.可以写成The book is worthwhile reading/to read. it is worthwhile that这个句型后面的that从句部分需要使用虚拟语气吗? Is it worthwhile for man to explore space 写一篇作文 Is it really worthwhile to spend a year or two volunteering in an underdeveloped region 而我认为去享受生活是值得的（it is worthwhile to） 对我们来说做这件事情是很值得的用(it is worthwhile) nothing worthwhile is easy 翻译 it is a lot of fun to play with tha panda .同义句转换______ ______it is to play with tha panda . tha box is so heavy that I can not carry it It is not ____ to discuss the question again and again.A.worth B.worthy C.worthwhile D.worth It is not ____ to discuss the question again and again.A.worth B.worthy C.worthwhile D.worth while I think it is a ------lesson.A.worth B.worthy C.worthwhile D.worth of I think it is a ------lesson.A.worth B.worthy C.worthwhile D.worth of it is not worthywhile to discuss the question again and again中的worthwhile为什么不能换成worthy?