In the simple present tense, the verb takes the marker –s when the subject is a singular noun or pronoun. With plural subjects, the verb does not take the marker –s.
My sister sings very well. (Here the verb ‘sing’ takes the marker ‘-s’ because the subject is the singular noun ‘my sister’.)
My sisters sing very well. (Here the verb ‘sing’ does not take the marker –s because the subject is a plural noun – my sisters.)
1. I work at a bank.
2. She lives with her parents.
3. Cows feed on grass.
4. He earns a handsome salary.
5. Janet wants to be a singer.
6. Emily makes delicious cookies.
7. Arti and her husband live in Singapore.
8. Rohan and Sania like to play card games.
9. Sophia speaks English very well.
10. Martin goes for a walk in the morning.
11. My grandfather adores his pet dog.
12. Plants need water and sunlight for making their food.