it的主格和宾格都是it。
it
[it]
[无人称代词]
it[所有格]
its
[宾格]
it;
[复数]
they,
[所有格]
their或theirs[宾格]
them;
相关例句：
Is
this
the
peony?
No,it
is
the
tree-peony.
这是芍药吗?不，这是牡丹。
He
took
a
stone
and
threw
it.
他拾起一块石头，把它扔了出去。
I
remembered
he
told
me
about
it.
我记得他跟我提过这件事。
It
all
started
with
Adam
and
Eve.
这种想法从亚当和夏娃以来就开始了。