There is/isn't are/aren't

• There are boys surfing in the sea.

• There aren't boys sufing in the sea.

• There isn't a girl surfing in the sea.

• There is a penguin on the beach.

• There isn't a penguin on the beach.

• There are penguins on the beach.

• There is an umbrella on the beach.

• There isn't an umbrella on the beach.

• There isn't a shark in the sea.

• There aren't shells on the beach.

• There are many shells on the beach.

• There is a shell on the beach.

• There aren't two birds under the umbrella.

• There are six birds under the umbrella.

• There are two birds under the umbrella.

• There isn't a monkey in the tree.

• There are two monkeys in the tree.

• There is a monkey in the tree.

• There is a sandcastle next to the girl.

• There is a sandcastle next to the boat.

• There is a sandcastle next to the dog.