They're a bit confusing. Like Gary said above, they don't sound very natural and would sound weird in normal conversation. I'm a little confused at what you're trying to say too. Maybe try: 1. "I was unaware you were unwell" or "I didn't know you were unwell/sick/ill" 2. In conversation maybe try "I'm going to try, I will never give up". It just sounds more 'natural' 3. I'm not really sure what you're trying to say in number three. Maybe try "The area has been destroyed" 4. This was a bit confusing. Maybe try "The areoplane/airplane crash was clear" 5. "I don't want these things." I hope this helps :)

No, none of them are natural, sorry. Do you want corrections? Although with some, I'm not even sure what you are trying to say.

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