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collected fixed asserted assist
Johns, Marys, doctors Johns, Marys, doctor’s John’s, Mary’s, doctor’s John, Mary, doctor’s
in, in in, on at, in at, on
How long How far How often How soon
to skate on it skating on it to skate on skating on
have been skating has been skating was skating has been skated
swimming; skate swimming; skating swim; skating swim; skate
swim; to skate swims; skating swimming; skating to swim; to skate
swimming, skating to swim, skating swimming, skate to swim, skate
not skating no skating to skate not to skate
Mary’s mother’s Mary’s mother Marys’ mother Mother’s of Mary
to go skating going skating went skating go skating
was having; was skating was having; skated had; was skating has had; was skating
have, been skating were, skating have you skated did, skate
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