Do we need the article 'The' here? In general, for example: - Sometimes, there aren't any clouds in the sky. - Sometimes, there aren't any clouds in sky. This is the confusion: I know that we don't use 'The' when we want to say something in general. And we use 'The' when we want to refer to a specific thing. So, according to this rule, I think the second sentence is correct, as I want to say that in general. However, I have doubts about it. Maybe I have learnt the rule wrongly. So, which one is correct? Thank you in advance.