Lesson 26. № 3. ГДЗ Английский язык 4 класс Верещагина. Помогите составить по образцу

Образуй предложения по примеру.
 
Water the flowers, please.
I have watered the flowers.
She has watered the flowers.
You must decorate the New-Year tree now.
I have decorated the New-Year tree.
He has decorated the New-Year tree.
Start to dance!
I have started to dance.
He has started to dance.
Cook some cake!
I have cooked some cake.
He has cooked the cake.
Open the door, please.
I have opened the door.
She has opened the door.
Lock the car with the key!
I have locked the car with the key
He has locked the car with the key
Clean the room!
I have cleaned the room.
He has cleaned the room.
Dance with me, please!
I have danced with her.
She has danced with me.