Use past simple, present perfect or present perfect continuos and the brackets: 1. you (to work) in the garden for hours already. go home and do your homework. 2. nick is tired because he (to watch) videos since two o'clock and he (to see) two films. 3. their parents (to know) jack for fifteen years. 4. we (to repair) our flat half a mouth. 5. she (not to change) her clothes yesterday evening.