there are some bird in tree（改为否定句）

there are some bird in tree（改为否定句） There are some birds in the tree.(改为否定句）There ____ ____birds There are some birds in the tree(改为否定句） there are some apples on the tree 改为否定句 there are some monkeys in the tree改为一般疑问句和否定句 There are some tree in front of the school改为否定句 are there any birds in the tree 改为否定句 there was a bird in the tree yesterday怎样改为否定句 There are some students in the classroom (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