The sentences can be converted to Direct Speech by adjusting the verbs and pronouns appropriately. Additionally, the tenses can be changed by following specific rules for each specified tense. Overall, this involves transforming sentences to match the context of direct speech and adjusting verb tenses.
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Here's how you can change the given sentences into Direct Speech and into the requested tenses:
Converting to Direct Speech:
The doctor said, "There are many people who are complaining about a poor quality of sleep these days."
We change 'were' to 'are' and 'those days' to 'these days'.
The woman asked, "Can I drink coffee tonight?"
Change 'asked if she could' to 'asked, "Can I"' and 'that night' to 'tonight'.
The doctor said, "The high number of people experiencing insomnia in my community does not shock me."
Change 'did not shock him' to 'does not shock me' to reflect direct speech.
Changing Tense For the Given Sentences:
"Insomnia will be one of the challenges of the twenty-second century." (Simple Future)
'Is' is changed to 'will be' to reflect simple future tense.
"A youth organisation was taking care of the elderly for free." (Past Continuous)
'Took care' is changed to 'was taking care' to show ongoing action in the past.
"The old woman had used many home-made remedies to regulate her sleep." (Past Perfect)
'Uses' is changed to 'had used' to indicate an action completed before another past action.