这是关于A
of
B,
谁修饰谁的问题。有点类似
a
number
of
people
和
the
number
of
people,
前者是A修饰B,后者B修饰A。
第一句的the
amount
of
food
是B修饰A,
want的是amount,
不是food。好比,I
want
to
know
the
weight
of
an
elephant.
第二句是A修饰B,
类似你说,
eat
this
amount
of
food
/
that
much
of
food
/
a
lot
of
food,等