Question

Mohan _ (solve) a difficult sum now

Answer 1

Hello mate

here's your answer

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mohan is solving a difficult sum now.

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Hope it helps you

Answer 2

Answer:

Mohan can solve a difficult sum now.

Mohan is solving a difficult sum now.

The sentence can be written in these two ways.

However, you can also discuss it further in your class with your teacher and your friends.

It will give a better understanding when you will discuss it in class.

You can refer your grammar books as well or search on the internet.