Question

Going back home with a guilty heart he was amazed to know that his son was not at home.
(Rewrite as a compound sentence​)

Answer 1

In order for a sentence to be grammatically correct, the subject and verb must both be singular or plural. In other words, the subject and verb must agree with one another in their tense. If the subject is in plural form, the verb should also be in plur al form (and vice versa).

going back to home with a guilty heart is bad thing

he was amazed that to know that his son was not at home