нужно правильно употребить в past simple , present perfect , present perfect continues
1. where are you? I (to wait) you for an hour already
2 He (not built) the house yet
3. Kate (to wash) the floor for twenty minutes and she ( to clean) two rooms in her flat.
4 the children ( to play) football since three o'clock but they are not tined.
5. Where you (to meat ) Mary and Josh the day before yesterday.
6. we ( to have buy) this house yet

спасибо большое)))

1.where are you?I have been waiting you for an hour 2.he hasn*t  build the house yet 3.kate   has been washing the floor for twenty minutes and she has  been cleaning two rooms in her flat4.the children have been playing football since three o*clock but they are not tired5.where did you  meat Mary and Josh the  day before yesterday6.we haven*t  bought this house  yet