What are Modal Verbs and their Rules

Modal verbs are auxiliary verbs which are used in the sentences to refer possibility, ability, advice, permission, obligation and others. However, modal phrases are used in the sentences to express the same things. The modal verbs are also known as helping verbs or modal auxiliaries.

A list of modal verbs:
Can, Could, Will, Would, May, Might, Shall, Should, Must.

Rules to Use Modal Verbs:

• ‘Not’ is used after the verb to refer a negative meaning.
• Modal verbs are placed before the subject in questions.
• Modal verbs are not changed according to the tense.
• Infinitive verbs are used after the modal verbs.

Examples of Modal Verbs:

Can (Ability) — I can write Bengali.
Can (Possibility) — Smoking can deteriorate the health.
Can (Permission) — Can I use your mobile for once?
Could (Ability in the past) -I could not speak Bengali.
Could (Possibility) — It could rain in this week.
Could (Polite permission) — Could I use your mobile phone?
May (Possibility)-It may rain in the evening.
May (Permission)- May I take your old study materials?
Might (Possibility)- Rahul might join the trip.
Might (Polite permission) — Might I suggest you the way to handle exam stress?
Shall (Permission)- Shall I collect the movie tickets today?
Should (Advice)- The students should practice the reference study materials before the final exam.
Should (Logical Conclusion)- You should be tired after a long train journey.
Will (Polite request)-Will you please come and join me at the station?
Would (Request)- Would you mind to wait for me?
Must (Strong obligation)-You must obey your mentor.
Must (Certainly)- You must be very busy for your brother’s marriage.
Must not (Prohibition)- You must not talk loudly in the hospital.