2. Tigers can run fast.
Please, be quiet!
Elephants can swim well
Is this snake safe?
... they swim badly
Some frogs are very loud
3. We are sitting in the park
David is studying Chinese
I am working at the moment
The dogs are eating in the kitchen
Sarah is having breakfast
4. We are not sitting in the park
David is not studying Chinese
I am not working at the moment
The dogs are not eating in the kitchen
Sarah is not having breakfast
5. Are you doing a test? Yes, I am
Is your teacher sleeping? No, she is not
Are your friends studying? Yes, they are
Is it raining today? No, it's not
Are your classmates singing? No, they are not
Is your dad working? Yes, he is