that is my pencil sharpener(改为一般疑问句)
is that you pencil sharpener
ls your last name green(作否定回答)
no,it isn't
lt ls my red eraser?
my eraser is red
this is an english book(对划线部分提问)
what's this?
her ruler is white(对划线部分提问)
What color is her ruler?
ls thisa pen（做否定回答）
no,it isn't
ls that her eraser(做肯定回答)
yes,it is
is ,dictionary,red,his(连词成句)
his dictionary is red
l am tim(改为一般疑问句并作肯定回答）
are you Tim?yes,i am
this is her pen(改为一般疑问句并作否定回答）
is this her pencil?no,it isn't
that is my book(改为一般疑问句并作肯定回答）
is that your book?yes,it is