Question

the child is in the park- singular
the children are in the park - plural ( why park doesn't change into parks?)​

Answer 1

here, in the park is predicate and the child/ children is subject for this sentence. So changes occur in verb according to subject and predicate has nothing to do with subject.

Answer 2

Explanation:

• Underline the reflexive pronounce used in the follo---Snow White told me dwarfs that she was left in the scary forest all by herself. She told the dwarfs, "I am glad that i have found your cottage.Do you live here by yourself?".The dwarfs told her that they had been living in the forest all by themselves. Snow White then asked the dwarfs,"Do you cook your food yourselves?." One of the dwarfs replied,"As you can see,none of us have ever bothered cleaning our house!"