worth
I
noun
BAD: The ring has great sentimental worth.
GOOD: The ring has great sentimental value.
BAD: They do not appreciate the worth of life.
GOOD: They do not appreciate the value of life.
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Worth is usually used as a preposition: 'A four-bedroomed house in the middle of town is probably worth about £200,000.'
The noun related to worth is value : 'The current value of property is very low compared with this time last year.'
Compare: 'That watch is worth fifty pounds.' 'That watch has a value of fifty pounds.'
II
preposition
1
BAD: The missing ring worths about two thousand pounds.
GOOD: The missing ring is worth about two thousand pounds.
BAD: A holiday doesn't worth all the effort it takes preparing for it.
GOOD: A holiday isn't worth all the effort it takes preparing for it.
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be worth £20/very little/a fortune etc : 'These old computers aren't worth much nowadays.'
2
BAD: It's also worth to visit the north of England if you have time.
GOOD: It's also worth visiting the north of England if you have time.
BAD: The museum was certainly worth to see.
GOOD: The museum was certainly worth seeing.
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it's worth doing sth; sth is worth doing (NOT to do ): 'It's worth remembering that these old cars can be very expensive to run.'