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Hi guys!

1.Paul was tired because he worked hard.
2. Paul was tired because he was working hard.

Can I use both and what is the difference in meaning? Maybe I should add something more to the second sentence, like "yesterday morning"? Someone has told me that in the second example Paul is still working, he hasn't finished, is it true?

2. Is it possible to use both, especially the second one:

How long have you been learning English?

How long were you learning English?

Thanks
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Comments  (Page 2) 
Thanks for that CJ!