There was a/an + n单数+某地（9句） There are+n复数+某地（9） There were+n

1、There was a pond in the park before.There was an apple on the table yesterday .
There was an apple tree in the park before.There was book on the desk yesterday .
There was a flower on the desk yesterday .There was a duck on the lake.
There was a dog in the house yesterday .There was a boy on the playground yesterday .
There was a pig on the farmyesterday .
2、There are some trees on the playground now.There are birds in the tree now
There are some apples on the tree .There are some bananas on the tree.
There are some boys in the park .There are some pupils on the playground now
There are some dogs in the park .There are ducks in the water
There are two cats in the box.
3.There were some girls on the playground .There were flowerd onn the tree .
There were some apples on chair.There were some bananas on the table.
There were some boys in house.There were five pens in the pencil-box.
There were three kites in the sky.There were some monkeys in the zoo.
There were two computers in the room yesterday..

用there is/was,there are/were填空。There is/was用单数句和不可数名词前，there are/was用复数句。
1.___only an apple in the basket.
2.___three boys in my family.
3.___two books on the desk last night.
4.___a ...