Question

Fill in the blanks with appropriate modals.
The boys ________ train hard if they want to win the competition​

Answer 1

The blank can be filled with an appropriate modal as follows:

The boys must train hard if they want to win the competition.

What are modal verbs?

• In English Grammar, we can describe modal verbs as a kind of verb which depict the possibility of occurrence of something or necessity of the occurrence of an action.
• As the boys need  to train hard in order to win the competition, hence modal verb 'must' can be used in the sentence.
• Examples of other modal verbs include can, could, should etc.