Hi, Let me offer some general comments about this kind of use of 'would'. It is used to refer to habits, repeated actions, in the past. eg When I was a boy, I would go to the park every day.
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Clive Here's the idea of 'future in the past', in the form of an example.
When it's 2005, you think "I will buy a car next year (ie in 2006)".
In 2010, you say "In 2005, I thought I would buy a car in 2006".
Note the similarity to reported speech.
Sorry, but I still can't see why it could not be future i