worthwhile的用法及搭配如下：
1.?從句法功能上看，worth?通常只用作表語，不用於名詞前作定語；worthy?和?worthwhile?可用作表語和定語。如：
It isn’t worth the trouble.?不值得費那個事。
He is a worthy gentleman.?他是位值得尊敬的紳士。
His behaviour is worthy of great praise.?他的行為值得高度贊揚。
They achieved a very worthwhile result.?他們取得了很有價值的成果。
We had a long wait, but it was worthwhile because we got the tickets.?我們等了很久，但還算值得，因為我們把票買到了。
2.?從所使用的修飾語來看，worth?習慣上不用?very?修飾(要表示類似意思可用?well)，而?worthy?和?worthwhile?則可以用副詞修飾。如：
That is very worthy of our attention.?那件事很值得我們註意。
Nursing is a very worthwhile career.?護理工作是很值得幹的職業。
但習慣上不說：The work is very worth doing. (very?應改為?well)
3.?從結構搭配來看：
(1) be worth?後可直接跟名詞、代詞、動名詞(該動名詞用主動形式表示被動意義)，但不能後接不定式。如：
The picture is worth $ 500.?這幅畫值?500?美元。
The book is worth reading. / It’s worth reading the book.?這本書值得讀。
註意不說：The book is worth to read. / The book is worth being read.
(2) be worthy?後不能直接跟名詞、代詞或動名詞，若要接，應借助介詞?of，也可後接不定式。如：
Their efforts are worthy of your support.?他們的努力應得到妳的支持。
He is worthy to receive such honour.?他應該得到這種榮譽。
This suggestion is?worthy?to be considered.?這個建議值得考慮。(註意：此句中的不定式要用被動形式表示被動意義)
(3) be worthwhile?後接動名詞或不定式均可。如：
It is?worthwhile?buying the dictionary.?這本詞典值得買。(其中的?worthwhile?也可換成?worth)
It is worthwhile to discuss the plan again.?這個計劃值得再討論壹次。(其中的?worthwhile?不能換成?worth，因為其後接用了不定式)
4.?在很多情況下，同壹個意思可用幾種不同的形式表達。