who在主语从句做什么成分

Question

如题所述

Answer 1

who在主语从句可充当主语，表语，宾语（原来是whom，但现在可以用who替换whom，介词后还是得用whom)
如：
Who
you
are
looking
for
is
not
known
to
us.(宾语)
Who
can
do
such
work
is
not
easy
to
know.(主语)
Who
you
are
has
been
told
to
your
teacher.

Answer 2

自然是主语。
who is late will be punished today.
whom the boss praises will be promoted soon.本回答被网友采纳