1) how many years has john been working for this company? или (how long)2) i don't know exactly, but when i began to work here, he had been working here for 3 years already.3) when did you phone to moscow? 4) i haven't phoned there yet.5) our students are writing the test in english, we have been writing it for 2 hours.6) but we have done only 5 tasks.7) when i entered the classroom, my friends had already been there.8) they had been sitting there for 10 minutes but the teacher hadn't come by that time yet.
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