modal verb
- used to indicate obligation, duty, or correctness
- used to give advice or make recommendations
- used to express expectation or probability
Usage: often expresses what is right or proper
Usage: softer than ‘must’
Usage: indicates what is likely to happen
Examples
- You should study for the test tomorrow.
- Students should arrive on time for class.
- You should see a doctor about that cough.
- The package should arrive by Friday.
- If you should need help, please call me.
- I should have finished my homework earlier.
- Should we leave now to avoid traffic?