1. Sun is our main star 2. He is man of ability 3. Old man was drinking tea 4. The car belongs to my friend. It´s my car 5. I ask my brother help me. I ask for my help 6. What is your opinion? 7. A cat on the chair- Don´t seat there. 8. A lot of birds on the cage 9. Sick animals in the Zoo! It´s a good place 10. Not a good restaurant in town

1. The Sun is our main star.      

2. He is a man of ability.            

3. An old man was drinking tea.      

4. This car belongs to my friend. It´s mine.  

5. I ask my brother to help me. I ask for help.  

6. What is your opinion?        

7. A cat is on the chair- Don´t sit there.    

8. A lot of birds are in the cage.      

9. There are not any sick animals in the zoo! It´s a good place.

10. There is not a good restaurant in town.

Explanation:

1. The Sun is our main star.      ( definite article is missing)

2. He is a man of ability.             ( article is missing)

3. An old man was drinking tea.       (article is missing)    

4. This car belongs to my friend. It´s mine.  (Demonstrative and Possessive Pronoun was missing)

5. I ask my brother to help me. I ask for help.  ( addition of correct Prepositions)

6. What is your opinion?         ( no error)

7. A cat is on the chair- Don´t sit there.     ( auxiliary verb  and spellings of sit)

8. A lot of birds are in the cage.        ( auxiliary verb )

9. There are not any sick animals in the zoo! It´s a good place. ( incomplete sentence structure)

10. There is not a good restaurant in town.  ( Demonstrative pronoun and auxiliary verb were missing)

The given sentences had some grammatical errors which are indicated in the brackets gives and rectified.

i believe it may be the hope this sorry if i'm wrong.

can you elaborate on what the question asks?