ItmayhavebeenatChristmas_____JohngaveMaryahandbag.-X题卡

had been； have met have been； have met had been； had met have been； had met

had been; have met have been; have met had been; had met have been; had met

may have been; can’t have been must have been; mustn’t have been may have been; must have been must have been; mustn’t be

had been； have met have been； have met had been； had met have been； had met

saw will be seeing have seen have been seeing

must have been shouldn’t have been may have been can’t have been

decorated have decorated have been decorated have been decorating

had been; have seen have been; have seen had been; had seen have been; had seen

saw will be seeing have seen have been seeing

had been; have seen have been; have seen had been; had seen have been; had seen

be seen be seeing have seen have been seeing

had been； have met    have been； have met
   had been； had met    have been； had met

had been; have seen have been; have seen had been; had seen have been; had seen

had been； have met have been； have met had been； had met have been； had met

should have done; may be could have done; must have been could have done; may have been must have done; might have been

saw will be seeing have seen have been seeing

had been; have seen have been; have seen have been; had seen had been; had seen

can be; mustn't be 　　　　　 may have been;must have been 　　 may have been; can't be 　　　 must have been ; can't have been

be seen be seeing have seen have been seeing

saw will be seeing have seen have been seeing

It may have been at Christmas _____ John gave Mary a handbag.