Can you explain me the difference between:
1 'next time' & 'the next time';
2 'last day' & 'the last day'
3 'past evening' & 'the past evening'
4 'during past several days' & 'during the past several days';
How to use 'the' with the words 'next', 'last', 'past', 'future', etc.
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