General English B1 · Lesson 4B

Grammar Bank

The rules behind this lesson — form, use, model sentences and the mistakes to avoid.

← Back to the lesson

Grammar focus of this lesson

Should / must / have to

1 structure

should / must / have to
Advice, strong obligation and external necessity.
I've got this
Rules & form
- ›should = advice and recommendation.
- ›must = strong obligation, often written rules.
- ›have to = necessity imposed by circumstances; past = had to.
- ›mustn't = forbidden · don't have to = optional.
Examples
- “You should double-check the figures.”
- “Everyone must wear a badge in the building.”
- “I had to reschedule the interview.”
Watch out · Never must to / should to.
Your own example