This question tests your understanding of verb forms in English, specifically the correct form to use after a modal verb.

The sentence is: Will you _____ here tomorrow?

Step 1: Identify the structure. The sentence begins with "Will you...". "Will" is a modal verb. Modal verbs (like will, would, can, could, shall, should, may, might, must) are special verbs that behave irregularly. They are followed by the base form (also called the bare infinitive) of the main verb.

Step 2: Apply the rule. The main verb in the blank is "to be". The base form of "to be" is simply "be".

Step 3: Evaluate the options.

• been: This is the past participle form. It is used with "have" (e.g., "have been") or as a passive form, not directly after a modal verb like "will".
• being: This is the present participle/gerund form. It is used after prepositions or in continuous tenses (e.g., "is being"), not directly after a modal verb.
• to be: This is the full infinitive form. While infinitives are often used, they are not used directly after modal verbs. The rule requires the base form without "to".
• be: This is the base form. This is the grammatically correct choice to follow the modal verb "will".

Final Answer: The most appropriate word to fill in the blank is be. The complete sentence is: "Will you be here tomorrow?"

Related Topic: Modal Verbs

Modal verbs are auxiliary (helping) verbs that express ability, possibility, permission, or obligation. The key rule to remember is that they are always followed by the base form of the main verb. Other examples include:

• She can speak French. (not "can speaks" or "can to speak")
• You must finish your homework. (not "must finishes" or "must to finish")
• They should go now. (not "should goes" or "should to go")

Related Topic: The Verb 'To Be'

The verb "to be" is highly irregular. Its forms change dramatically depending on the subject and tense. Its principal forms are:

• Base form: be
• Present tense: am, is, are
• Past tense: was, were
• Past Participle: been
• Present Participle/Gerund: being

Knowing which form to use is a fundamental skill in English grammar.