Should / Shouldn't — advice and recommendations

Use should to give or ask for advice, make a recommendation, or say what is right or sensible.

FormExample
should + bare infinitiveYou should drink more water. · We should leave now.
shouldn't + bare infinitiveYou shouldn't eat before swimming. · He shouldn't work so hard.
Should + subject + verb?Should I call a doctor? · What should I wear?
Should ≠ Must: "Should" is advice — it's a good idea but you have a choice. "Must" is an obligation — you have no choice. "You should see a doctor." (advice) vs "You must wear a seatbelt." (law/obligation)
Common uses:
Advice: "You should try this restaurant — the food is amazing!"
Recommendation: "We should book tickets in advance."
Criticism: "You shouldn't leave your bag on the floor."
Asking for advice: "Should I take the job or not?"

Might / May — possibility

Use might or may to talk about something that is possible — you are not sure if it will happen.

VerbMeaningExample
might possible — about 50% or less sure It might rain tonight. · I might go to the party.
may possible — slightly more formal than might She may be late. · There may be delays.
might not possible not — the negative He might not come. · I might not have time.
Might vs Will: "It will rain." = certain / predicted. "It might rain." = possible, not sure. Use "might" when you are uncertain. Use "will" when you are confident.

Exercises

Choose the correct modal.

1. You look tired. You ___ go to bed earlier.

2. I'm not sure what I'm doing this weekend. I ___ visit my grandmother.

3. You ___ eat so much junk food. It's bad for you.

4. Take an umbrella — it ___ rain later.

5. ___ I call the restaurant and book a table in advance?