s+has\have+been+pII+....(bY+O)
the new has surprised me
they haven't used this machine for ages
my sister hasn't bought that motorcycle
nobody has seen tim since he left school in 1990
she has bought two new dresses recently
we haven't written that report
have you tunred off all the lights
have his parents given him a new dictionary
why haven't you done this exercise
has she received that letter
have you watched that kind of flim before
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Sinh Học lớp 12
