和worthy 用在相同意思的情况下的用法.

1. worth是一个只能作表语的形容词,意思为“值……的”、“相当于……的价值的”、“有……价值的”、“值得……的”.由于它类似介词,须在后面接名词、或主动形式的动名词作宾语.例如：
This second-hand car is worth $2000 at the most.
The exhibition is worth a visit/visiting.
It’s not worth getting angry with him.
2. worthy可作表语,也可作定语.作定语时意思为“有价值的”、“值得尊敬的”、“应受到赏识的”；用作表语时意思为“值得……的”、“应得到……的”,其后接of sth.,也可以后接to do sth.,例如：
Guangzhou is worthy of a visit/ to be visited.
He said he was not worthy to accept such honour
The school has educated many worthy young people.
3. worthwhile与worthy一样,既可作表语,又可作定语.表示某事因重要、有趣或受益大而值得花时间、金钱或努力去做,一般做“值得的”、“值得做的”、“有意义的”解.用作表语时,可接动名词或动词不定式.例如：
The Summer Palace is worthwhile going / to go to have a visit.
Helping old people is a worthwhile activity.
Thank you for your worthwhile suggestion.