be doing句型10个求

问题描述:

be doing句型10个求

I am watching TV.
she is doing her homework.
he is playing the violin.
my dog is playing with a ball.
we are singing and dancing happily.
they are having an english lesson.
my mother is cooking food.
liu tao is picking oranges.
su hai and su yang are taking photos.
Mrs Green is collecting eggs.