1.When I got there, the concert has already begun.
2.We reached the shop before six o'clock.
3.I told him I have learned English.
4.The patient was already dead when the doctor arrived.
1.When I arrived at that time, the concert had already started.
2.we will arrive before 6 o 'clock in the shops .
3.I told him I had studied English.
4.when the doctor arrived. Patient is dead.
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