worth, worthy, worthwhile用法區別一：
worth表示“值，值得”，可用表語或後置定語，其後一定要有名詞或動名詞作賓語，但不能接不定式。如：
The book is worth $ 100.這本書值100元。
The book is worth reading.這本書值得看。
This is a book worth reading.這是一本值得讀的書。
Our house is worth about £100 000.
我們的房子大約值10萬英鎊。
How much is this painting worth?
這幅畫值多少錢？
The museum is certainly worth a visit.
這家博物館的確值得參觀。
This idea is well worth considering.
這個想法很值得考慮。
It's worth making an appointment before you go.
去之前預約一下是值得的。
worth, worthy, worthwhile用法區別二：
worthy表示“應得，配得上，值得”，常作表語或後置定語，後接不定式，或of加名詞或動名詞。作定語時，主要用於修飾人或諸如事業、生活等抽象名詞；作表語時，常後接被動語態的動詞不定式，或介詞 of 加名詞或被動語態的動名詞。如：
That's a worthy task.
那是一項很有價值的工作
a worthy champion 當之無愧的冠軍
a worthy champion/opponent/winner
值得尊敬的冠軍/對手/獲勝者
He felt he was not worthy of her.
他覺得他配不上她。
His behaviour is worthy of great praise. 他的行為應受到高度讚揚。
I think he is not worthy of her. 我認為他配不上她。
The book is worthy of being read. = The book is worthy to be read.這體書值得讀。
This is a book worthy of being read. = This is a book worthy to be read.這是一本值得讀的書。
The museum is worthy to be visited/of a visit/of being visited.
這個博物館值得參觀。
worth, worthy, worthwhile用法區別三：
worthwhile表示“值得的，值得幹的，值得花時間/金錢/精力的”，可作定語、表語或賓補。如：
Nursing is a very worthwhile career. 護理是很值得幹的職業。(定語)
The visit to Paris is worthwhile. 去巴黎訪問是值得的。(表語)
I think it worthwhile to read the book. 我認為看那本書是值得的。(賓補)
還可用於It is worthwhile doing /to do sth. 句型。如：
It is worthwhile reading /to read the book.= Reading /To read is worthwhile.這本書值得看。
有時可在worth與while之間插入one's。如：
The work is worth your while. 這工作值得你去做。
It is worth our while to discuss the question. 這個問題值得我們討論。
Make it worth sb.'s while 酬謝某人。如：
This film is worth our while to see again.
這部影片值得我們再看一遍。
They promised to make it worth her while if she would take part. 他們許諾說她要是參加，就給她報酬。
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