求英语高手来帮忙哦!1There are some dictionaries in these bags把他改为否定句

There are some dictionaries in these bags?(单数形式) There are some books in their bags 改为同义句 there are some books in the bags改为同义句,把there are 换掉,能换成什么? these are some keys in classroom e7改为否定句 把there are some children in the playground改为否定句和一般疑问句 把There are some elephant in the forest.改为否定句 There are some students in the classroom (改为否定句) there are some bird in tree（改为否定句） There are some clouds in the sky.改为否定句 改为否定句：There are some boats in the river. There are some pictures in our classroom.改为否定句 There are some plants in the classroom 改为否定句