Sure! Here are some examples of transforming affirmative sentences in third-grade English into general questions:
1. Affirmative: I like to play soccer.
General question: Do you like to play soccer?
2. Affirmative: She has a pet cat.
General question: Does she have a pet cat?
3. Affirmative: We are going to the park.
General question: Are we going to the park?
4. Affirmative: They can swim very well.
General question: Can they swim very well?
5. Affirmative: He enjoys eating ice cream.
General question: Does he enjoy eating ice cream?
6. Affirmative: The dog is sleeping in its bed.
General question: Is the dog sleeping in its bed?
7. Affirmative: We have finished our homework.
General question: Have we finished our homework?
8. Affirmative: She likes to read books.
General question: Does she like to read books?
9. Affirmative: They are playing in the garden.
General question: Are they playing in the garden?
10. Affirmative: He can ride a bicycle.
General question: Can he ride a bicycle?
Remember to use the auxiliary verb "do" or "does" at the beginning of the general question, and to invert the subject and the auxiliary verb.