关于宾语从句的问题？

“to eat up what is left in your plate”是用来补充说明“is a good manners”的系表结构的；
故其“to eat up what is left in your plate”不是宾语，不是谓语，不是状语，不是主语，不定语，所以只能是补语。

正所谓，to-动词不定式用来补充说明。

而”what is left in your plate“正是用来接那个动词“to eat up”，作后者之宾语，故曰其宾语从句。

what is left in your plate 是动词不定式eat up的宾语从句，汉义：吃光你盘子里所剩下的东西。

who
do
you
think
is
the
best
student
in
our
class
？改为宾语从句
是改成
do
you
think
who
the
best
student
is
in
our
class
？---才对。
但是此句子句式是不同的哦。
who
（do
you
think
i）s
the
best
student
in
our
class
？括号里是插入语，而你后面do
you
think
who
the
best
student
is
in
our
class
？--的do
you
think
不是插入语哦。
do
you
think
who
the
best
student
is
in
our
class
？---这句话是对的。但是并不是who
do
you
think
is
the
best
student
in
our
class
？改成的宾语从句。
我们只是把主语和谓语动词换一下位置而已，而不是要把后面in
our
class状语都提前。