A they had got to the bus stop B had they got to the bus stop
C did they get to the bus stop D they got to the bus stop
A does B is doing
C will be doing D will do
A came B did come
C was to come D come
A had gone B have gone
C be going D go
A hasn't heard B hasn't been hearing
C hadn't heard D didn't bear
A gave B to give
C giving D would give
A he had gone B had he gone
C his going D he went
A come B are coming
C came D have come
A is stoping B stops
C will stop D shall stop
A have been tested B had been tested
C were tested D had tested
A didn't ever meet B have never met
C have ever met D never met
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