Question

This state of Maharashtra will work for the betterment of the common people of Maharashtra.
(rewrite it using modal auxiliary showing obligation)

Answer 1

This state of Maharashtra must work for the betterment of the common people of Maharashtra.

or

This state of Maharashtra has to work for the betterment of the common people of Maharashtra.

Explanation

‘Must’ is a modal verb that is used to express something necessary and very important. For example to tell people a rule or law, we use this modal. An example of the usage of modal ‘must’ is: Vehicles must not be parked in front of the entrance.

‘Have to’ is also a modal verb that is used to show that you must do something. We also use ‘have to’ when the situation makes something that is necessary to be done.

Answer 2

The given sentence ‘This state of Maharashtra will work for the betterment of the common people of Maharashtra’ after converted using modal auxiliary showing obligation will be ‘This state of Maharashtra must work for the betterment of the common people of Maharashtra’.

The word ‘must’ here, is used as a modal auxiliary verb which also shows obligation or necessity in the sentence.