英语翻译变否定：1I'm pumping up this tyre2he's playing hopscotch wit

变否定：
I'm not pumping up this tyre
he's not playing hopscotch with the girls
they're not eating standing beside a lake
the children are not enjoying billy's birthday parte
变一般疑问;
Is the dog holding the stick betweenies teeth now
Is she coming out of that shop?
Are they eating sandwiches cakes and biscuits?