第1个回答 2019-05-10
肯定句:主语+be动词(am
/is
/are)+动词ing+其他。
look!
they
are
playing
football.
否定句:主语+be动词(am
/is
/are)+not+动词ing+其他。
tom
isn't
watching
tv
now.
一般疑问句:be动词+主语+动词ing+其他。
回答:yes,主语+be.
或
no,主语+be
not.
are
you
reading
at
the
moment?
yes,
i
am./
no,
i
am
not.
特殊疑问句:特殊疑问词+一般疑问句
who
are
you
waiting
for?
i
am
waiting
for
my
mother.