The windows are cleaned three times a year. - Mum cleans the windows three times a year., This bill isn't paid every month. - She doesn't pay this bill every month., Five trees were cut last week. - They cut five trees last week. , My car wasn't repaired yesterday.  - The mechanic didn't repair my car yesterday., Five e-mails have been sent so far. - She has sent five e-mails so far., A present hasn't been given to her yet. - They haven't given her a present yet.,

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