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htm Also, have a look at these threads: In future, try our Search box at the top left of each page:
- htm Also, have a look at these threads: In future, try our Search box at the top left of each page:
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You can start by reading about these two auxiliary verbs here:
http://grammar.ccc.commnet.edu/grammar/auxiliary.htm
http://library.bcu.ac.uk/learner/Grammar%20Guides/3.07%20Mo
http://grammar.ccc.commnet.edu/grammar/auxiliary.htm
http://library.bcu.ac.uk/learner/Grammar%20Guides/3.07%20Mo
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On difference is present (can) and past (could)
He can play tennis.
He could play tennis when he was young.
Check the dictionary entries for more information, because "could" can be used for the present time, too.
http://dictionary.reference.com/browse/Can?s=t
He can play tennis.
He could play tennis when he was young.
Check the dictionary entries for more information, because "could" can be used for the present time, too.
http://dictionary.reference.com/browse/Can?s=t
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