The verb should agree with the subject in number and person
A singular subject (he,she ,sita) takes a singular verb (is, goes, eats) whereas a plural subject takes a plural verb.
- My father goes to work. (not Go)
- They are planning to construct a huge bridge across the river.( not is planning).
- A bouquet of yellow roses lends color and fragrance to the room.(not lend)
- The students have been talking to the teacher.(not has been)
- The student has been talking to me.(not have been)