Ответьте, используя Past Perfect Continuous.
HOW LOHG HAD
1 … it been snowing when you left the old house? (for 4 hours)
2 … Eton been working before he retired? (for 20 years)
3 … Mike been living there when Janet moved in? (for a fortnight)
4 … they been studying German before they finaly went to Berlin? (for 5 years)
5 …the authors been working on the novel before they sent it to a publisher? (for 2 years).
6 … Pele been playing football before he took part in that championship? (for 6 years)
7 … the students been listening attentively to the dialog before they could understand the basic meaning? (for an hour)
8 … the children been walking before the granny called them? (for 2 hours)