Find and correct the mistakes in the sentences

Correction of mistakes:

1. Mistake: 'We'll go as soon as the weather will improve.'
   Correction: 'We'll go as soon as the weather improves.'
   Explanation: In sentences with 'as soon as', when referring to a future event, the present simple tense is used in the subordinate clause.
2. Mistake: 'The boat won't leave until everyone will be on board.'
   Correction: 'The boat won't leave until everyone is on board.'
   Explanation: Similar to the first sentence, the present simple tense is used after 'until' when referring to a future event.
3. Mistake: 'As soon as the sun will come out, I'll take some photos.'
   Correction: 'As soon as the sun comes out, I'll take some photos.'
   Explanation: The present simple tense is used in the 'as soon as' clause referring to a future event.
4. Mistake: 'When we'll get to the hotel, we'll feel much happier.'
   Correction: 'When we get to the hotel, we'll feel much happier.'
   Explanation: In conditional sentences with 'when', the present simple tense is used for future events.