Modal Verbs: Can, Should
Modal verbs are special verbs used to express ability, possibility, permission, necessity, or advice. Here, we’ll focus on can and should.
1. When Do We Use the Modal Verbs?
Can: Expresses ability, permission, or possibility.
- I can swim.
Should: Expresses advice or a suggestion.
- You should study for the exam.
2. Forming the Modal Verbs
Positive Sentences
Structure: Subject + can / should + base form of the verb
- I can play the guitar.
- She can speak Spanish.
- You should eat more vegetables.
- He should go to the doctor.
Negative Sentences
Structure: Subject + cannot (can’t) / should not(shouldn’t) + base form of the verb
- I can’t drive a car.
- They cannot stay late.
- You shouldn’t skip breakfast.
- We should not waste water.
Questions
Structure: Can / Should + subject + base form of the verb?
- Can you swim?
- Can he help us?
- Should I bring my umbrella?
- Should we call her?
3. Common Uses
Can:
- Ability:
- I can play the piano.
- Permission:
- You can use my phone if you need.
- Possibility:
- It can be cold in the mountains.
- It can be cold in the mountains.
Should:
- Advice:
- You should study harder for the test.
- Obligation:
- We should respect our teachers.
- Suggestions:
- You should try this restaurant; it’s amazing.
4. Examples
Can:
- Affirmative:
- I can ride a bike.
- She can cook Italian food.
- Negative:
- They can’t run fast.
- He cannot come to the party.
- Questions:
- Can you help me with this?
- Can she sing well?
Should:
- Affirmative:
- You should drink more water.
- He should apologize for being late.
- Negative:
- You shouldn’t eat so much junk food.
- We should not forget her birthday.
- Questions:
- Should I bring my ID?
- Should they join us for dinner?
