Tina knocked at the door for nearly ten minutes her husband opened it.

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knocked was knocking had knocked knocks

the telephone rang Anna heard the telephone ring someone knocked at the door there was a knock at the door

knocked was knocking had knocked knocks

knocked; did was knocking; did knocked; was doing knock; am doing

the telephone rang someone knocked at the door Mary heard the phone rang the door was opened

was knocking at knocked knocked at knock at

read, was knocking read, knocked was reading, knocked was reading, was knocking

surprised surprising sruprise surprisingly

somebody anybody nobody everybody

watch, knocked watching, knocking w

the telephone rang someone knocked at the door Mary heard the phone rang the door was opened

knocked, beat being knocked, beat being knocked, hit beat, hit

break off break down break into break out

had I gone；someone knocked at I had gone；did someone knock at had I gone；did someone knock at did I go；someone knocked at

had knocked has knocked knocks knocked

but because when and

knocked to knock knock knocking