I don't think the book is worth______unless it is worthy____several times.A.being bought,to be readB.buying,being readC.buying,to be readD.buying,to read应该选c,为什么?worth的搭配有哪些?

I don't think the book is worth______unless it is worthy____several times.A.being bought,to be readB.buying,being readC.buying,to be readD.buying,to read应该选c,为什么?worth的搭配有哪些?
I don't think the book is worth______unless it is worthy____several times.
A.being bought,to be read
B.buying,being read
C.buying,to be read
D.buying,to read
应该选c,为什么?worth的搭配有哪些?

I don't think the book is worth______unless it is worthy____several times.A.being bought,to be readB.buying,being readC.buying,to be readD.buying,to read应该选c,为什么?worth的搭配有哪些?
be worth doing sth值得做某事 无被动
it is worthy to do sth 做什么是值得的,有被动
worth与worthy都是作“值得”讲的形容词,但在使用上和与词的搭配关系上都不相同.
一、worth一般只用作表语
1．主语（物）+be +worth + 名词.
Hawaii is a beautiful place for travelling and worth a visit.夏威夷是个旅游胜地,值得一游.
The new bike is worth 350 yuan .这辆新自行车值350元.
2．主语（人）+ be +worth + (表示金钱或财产)名词.表示“拥有……财产”.
He is worth several million dollars .他有好几百万美元的财产.
How much is Mr.Green worth 格林先生有多少财产.
3．主语（物）+ be + worth +动名词.
The book is worth reading .这本书值得一读.
The car isn't worth repairing.这辆汽车不值得修了.
请注意：（1）在这种情况下,名子的主语与动名词在逻辑上有动宾关系,因此这个动名词应该是及物的（如上述例句）或具有及物性质的短语动词（如下述例句）.
The broadcast programme is worth listening to .这条广播节目值得一听.
The picture is worth taking good care of .那幅画值得好好保存.
（2）在这结构中,也可用先行词it 作主语.
It is worth repairing the TV set.这台电视机值修一下.
（3）worth前面,一般用well修饰,不用very.
The scheme is well worth a try .这个计划很值得一次.
4．Worth one's while "对……是值得做的,对……有益的,使感兴趣的”,主语是动名词或动词不定式.句首用it作形式主语.
（1） It is worth (one's) while + doing sth.值得某人做某事.
It is worth out while discussing the question again .这个问题值得我们再讨论一下.
（2） It is worth (one's)while +to do sth.=To do sth .is worth(one's)while.值得（某人）做某事.
It would be well worth your while to come to the meeting.来参加这个会议对你来说是很值得的.
二、worthy 可作定语和表语,作表语时是“值得”的含义.
1．Worthy 可作定语,意思是“可敬的,有价值得,相称的”.
They are my worthy friends.他们是我的可敬的朋友.
2． Worthy 作表语,后接不定式作状语.如果句子的主语是动词不定式的逻辑主语,则不定式有主动语态；如果是动宾关系,则用被动语态.
The problem is worthy to be considered .这个问题值得考虑.
3．Worthy of “值得……,配得上……”.
（1）主语 + be + worthy of + n .
The article is worthy of careful study .这篇文章值得仔细研究.
Her achievements are worthy of the highest praise .她的成就值得高度的赞扬.
（2）主语 + be + worthy of + being done
The book is worthy of being read .这本书值得一读.
比较：The book is worthy to read.
The book is worth reading .
(3)worthy of 作后置定语.
He is a teacher worthy of great respect.他是位受尊敬的教师.
He is a poet worthy of the name .他是一位名副其实的诗人.

worth doing=worthy to be done值得做某事
固定搭配