Составьте отрицательные предложения,соответствующие данным утвердительным предложениям.1)i am at home.2)the picture is on the wall.3)my mother is an engineer.4)this is my bag.5)they are beautiful.6)she's got a new dress.7)i've got many friends.8)we've got pens.9) he'a got a sister.10)it's got big ears.11)you can play football.12)she can ride a bicycle.13)i can cook.14)they can dance well.15)it can fly.