Если существительное в единственном числе, то предложение начинается с It's, если в мн. числе - то с They're
далее меняем кто? на чей? I - my я - мой he - his он - его she - her она -ее it - its оно - ее we - our мы наш you - your вы ты - ваш твой they - their они - их
It's our family. They're your sisters. It's her grandfather. They're his cars. It's their garden. They're its toys. It's my computer. They're our friends.
далее меняем
кто? на чей?
I - my я - мой
he - his он - его
she - her она -ее
it - its оно - ее
we - our мы наш
you - your вы ты - ваш твой
they - their они - их
It's our family.
They're your sisters.
It's her grandfather.
They're his cars.
It's their garden.
They're its toys.
It's my computer.
They're our friends.