英语句式变化！！

The monkey is eating a banana.(复数句）
The monkey is eating bananas.
He is reading a book.(一般疑问句)
Is he reading a book?
I can cook meals.一般疑问句
Can I cook meals?
I am answering a phone.特殊疑问句
What are you doing?
They are watching insects.变单数第三人称
He is watching insects.

The monkeys are eating bananas.
Is he reading the book?
Can you cook meals?
What are you doing?
He is wathing insects.

The monkeys are eating bananas (复数句）
Is he reading a book? (一般疑问句)
Can I cook meals？ 一般疑问句
What are you doing? 特殊疑问句
She/He is watching insect. 单数第三人称