Will is a modal verb commonly used in the English language. It expresses future actions, predictions, and intentions. It can also be used to convey willingness or insistence. As a modal verb, it is followed by the base form of a verb.

In terms of grammar, will is used to create the simple future tense. It indicates an action that is expected to happen after the present time. For example, “I will go to the party tomorrow.”

When used to express predictions, will indicates a strong belief about future events. For instance, “It will rain tomorrow.” Will can also be combined with other modal verbs like might or may to denote varying degrees of possibility. For example, “He may or may not come to the meeting.”

Furthermore, will can be used to convey willingness or insistence in requests or offers. It is often used to make polite requests or express a desire to help, as in “Will you please pass the salt?” or “I will be happy to assist you.”