заранее полные утвердительные предложения) in Present Perfect. Don't use full stops, they are given.
1. Millie in the sea. (swim)
2. They a tree. (grow)
3. Sam a bike today. (ride)

Present Simple.
The teacher gives the task to the student . 
The teacher doesn`t give the task to the student . 
Does the teacher give the task to the student? Yes, she does.
Past Simple.
The teacher gave the task to the student .
The teacher didn`t give the task to the student . 
Did the teacher give the task to the student? Yes, she did.
Present Simple.
Your sister is at school.
Your sister isn`t at school.
Is our sister at school? Yes, she is.
Past Simple.
Your sister was at school.
Your sister wasn`t at school.
Was our sister at school? Yes, she was.

1. Are there many people in the zoo? Yes, there are.
2. Are there three newspapers on the table? Yes, there are.
3. Is there a rock near the lake? Yes, there is.
4. Is there an elephant in the zoo? Yes, there is.
5. Are there many children in the park? Yes, there are.
6. Are there four seasons in a year? Yes, there are.
7. Is there a zebra in the grass? Yes, there is.
8. Is there grass under the tree? Yes, there is.
9. Are there books on the bookshelf? Yes, there are.
10. Are there toys on the floor? Yes, there are.