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had been; have seen w。w。w.k。s。5。u.c。o。m have been; have seen had been; had seen w。w。w.k。s。5。u.c。o。m have been; had seen
many children have been neglected． child maltreatment is most serious in developed countries． 20%of children have been sexually abused． 25—50%of girls have been physically abused．
had not been for were not for should not be for were it not to be for
had played have been playing am playing have been played
So her parents have So have been her parents Her parents have been so So have her parents
would stay was staying have been staying had stayed
has been playing is playing have been playing have played
had played have been playing am playing have been played
have has has been have been
must be must have been should be should have been
adopted harvested adapted recognized
Because most people have not been exposed to a similar virus. Because one shot is enough to trigger the production of antibodies. Because flu vaccine has always been given in two shots. Because most people have never had a flu.
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