What is an interesting question. I am new in the field. When I want to mix tenses, what does it mean? Both are equally correct.

When some people

told me that the earth is flat, and it’s not so, there is nothing more. I mean in the past, people believed ( as a fact until the moment) that people believed that ( until now) that it is so.

If the

earth were flat it would mean the earth would not have been flatif (or it used to be, but at the moment of speaking people stopped believing). and compare it with old people who believed that the earth was flat.

Why

do all reports about speech have their own time?

When you’re reporting what someone said or thought, there are two different times to think about:

  *the time when the person said it or thought it* *the time that the person was speaking or thinking about*  

The first clause is reflected in words like _ said” or “_ believed” The

second clause and the rest of the sentence are usually the explanation.

Both the verbs of the subject in the main sentences are in past tense, so the sentences carry the past tense.

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want

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