it代表已知的一个物体，特制这个。例如：This
dog
is
clever,I
want
it.
one代表某"一个"已知的物体，但是并不特制。例如：These
dogs
are
clever,
I
want
one.
that代表那一个，或者是与之前相对的另一个。例如：This
dog
is
clever,but
I
prefer
that
dog.
the
one代表特制的某一个物体。一般情况下需跟相对应的定语。例如：These
dogs
are
all
clever,but
I
want
the
one
which
is
white.
内容全部来源于网络收集，如有侵权，请联系网站删除：QQ：24596024