Identify the simple subject and main verb in each of the sentences below. Put one line under the subject and two lines under the verb.

1. I ate dinner at Jim's house.
   
   A: subject - I, verb - ate



2. Birds usually fly south for the winter.
   
   A: subject - Birds, verb - fly



3. Students must learn many new words.
   
   A: subject - Students, verb - learn



4. Mike is a very shy person.
   
   A: subject - Mike, verb - is



5. Children see the world differently from adults.
   
   A: subject - Children, verb - see



6. We waited patiently for the new guy to show up.
   
   A: subject - we, verb - waited



7. Many textbooks begin with lessons on introductions.
   
   A: subject - textbooks, verb - begin



8. Most fathers work hard to care for their children.
   
   A: subject - fathers, verb - work



9. She was my first teacher.
   
   A: subject - She, verb - was



10. Swimming is good exercise.
    
    A: subject - Swimming, verb - is