Answer:
1)Ann likes to play chess and guitar.
2)My mother can bake brownies and pizza.
3)I am good at maths but I am not good in writing long sentences.
4)You can pick red dress and you can pick blue dress.
5)I am not going to do my homework for I did not understand the question.
6) you can borrow my umbrella but i need it too.
7) I am going to my friend’s place but/so i have to finish my errands first.
Explanation:
a simple sentence can be converted into a compound sentence by expanding a word or phrase into a clause and by using a <em>coordinating conjunction</em> to connect the clauses.
<em>coordinating conjunction: </em>
for, and, nor, but, or, yet & so.
 
        
                    
             
        
        
        
The rule about subjects joined by 'and' is that there must be a subject-verb agreement. This means that if the subject is singular, then the verb must be also singular. On the other hand, if the subject is plural that means the verb must also be plural.