worth, worthy, worthwhile用法区别一：
worth表示“值，值得”，可用表语或后置定语，其后一定要有名词或动名词作宾语，但不能接不定式。如：
The book is worth $ 100.这本书值100元。
The book is worth reading.这本书值得看。
This is a book worth reading.这是一本值得读的书。
Our house is worth about £100 000.
我们的房子大约值10万英镑。
How much is this painting worth?
这幅画值多少钱？
The museum is certainly worth a visit.
这家博物馆的确值得参观。
This idea is well worth considering.
这个想法很值得考虑。
It's worth making an appointment before you go.
去之前预约一下是值得的。
worth, worthy, worthwhile用法区别二：
worthy表示“应得，配得上，值得”，常作表语或后置定语，后接不定式，或of加名词或动名词。作定语时，主要用于修饰人或诸如事业、生活等抽象名词；作表语时，常后接被动语态的动词不定式，或介词 of 加名词或被动语态的动名词。如：
That's a worthy task.
那是一项很有价值的工作
a worthy champion 当之无愧的冠军
a worthy champion/opponent/winner
值得尊敬的冠军/对手/获胜者
He felt he was not worthy of her.
他觉得他配不上她。
His behaviour is worthy of great praise. 他的行为应受到高度赞扬。
I think he is not worthy of her. 我认为他配不上她。
The book is worthy of being read. = The book is worthy to be read.这体书值得读。
This is a book worthy of being read. = This is a book worthy to be read.这是一本值得读的书。
The museum is worthy to be visited/of a visit/of being visited.
这个博物馆值得参观。
worth, worthy, worthwhile用法区别三：
worthwhile表示“值得的，值得干的，值得花时间/金钱/精力的”，可作定语、表语或宾补。如：
Nursing is a very worthwhile career. 护理是很值得干的职业。(定语)
The visit to Paris is worthwhile. 去巴黎访问是值得的。(表语)
I think it worthwhile to read the book. 我认为看那本书是值得的。(宾补)
还可用于It is worthwhile doing /to do sth. 句型。如：
It is worthwhile reading /to read the book.= Reading /To read is worthwhile.这本书值得看。
有时可在worth与while之间插入one's。如：
The work is worth your while. 这工作值得你去做。
It is worth our while to discuss the question. 这个问题值得我们讨论。
Make it worth sb.'s while 酬谢某人。如：
This film is worth our while to see again.
这部影片值得我们再看一遍。
They promised to make it worth her while if she would take part. 他们许诺说她要是参加，就给她报酬。
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