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now ...can... swim/ have a swim ...could not ... now ...can... fly a kite/ kites ...could not ... now ...can... A. Using “can”/ “could” to talk about ability we use “can” to say that we are able to do something now. we use “could” to say that we were able to do something in the past. . I can (cannot /can’t /can not ) swim. What about you? He could (couldn’t /could not) dance in the past. What about you ? What can they do ?/ What could they