是it is worth while还是it is worthwhile对?

是it is worth while还是it is worthwhile对? It's worth while 后面是to do 还是doing这个语法我忘了, It is worth to do还是doing It is worth trying.这里的worth是介词吗 It is worth trying.这里的worth是介词吗 it is worth of doing xxx 还是 it is worth doingxxx 怎么我看见有worth doing的用法谢谢 有这种说法吗,it is worthwhile to do?在下才疏学浅 确实没听过 worth a while to do 不过还是谢谢 blowoff 兄了 it is worth It is worth while reading the book.It would be worth his while helping the foreigner.为什么用would为什么一句加would,另一句不加? I wonder______ it is worth doing 填that 还是if is it worth it though... the book is not worth my while. 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 是it doesn't worth five pounds 还是it isn't worth five pounds?为什么 It is worth noting that It is worth 100 yuan. 请问是to do 还是doing?it is worth for us learning/to learn his quality上面那句和这句的意思一样吗?it is worth learning his quality 英语翻译it is worth the trouble,be worth + 名词 这个用法是怎么样的?it is worth the trouble 中文意思是什么？