1, meaning difference:
1)worth as an adjective has the value of …; Worth … money; (of behavior) valuable and valuable; It's worth it. Something of equal value (ten yuan, forty pounds, etc.) ); Something that can be used (for a week, a month, etc.) ); Value; Meaning; Function.
2) It is worth spending time and energy, doing and necessary.
2. Differences in sentence composition:
1) value is not worth it; "Value" is a very common but special descriptive adjective, which can be used as both predicative and attributive.
2) it in Worthit is just a pronoun, which refers to the above. Worth it must be preceded by what it refers to, that is, worth it will appear in complex sentences or dialogues or essays.
I spent a lot of money and time on this ship, but it was worth it.
I spent a lot of money and time on this ship, but it was worth it.
Extended data:
Common usage of worth:
1) Beworthy sth means something of value.
It is (very) worth doing something, which means: it is (very) worth doing something.
3) Words with value as the root are: worthless; Worthless; Valuable adjectives. adjectives. It means: worth doing; It means: worthy of ... before nouns.
This film is worth watching 100 times because it reminds people of their children.
I can't get tired of watching this movie. It reminds people of their childhood.
Baidu Encyclopedia-Value