✦ Lesson 5 · Grammar 2
Give advice: should and shouldn't
We use should to give advice: what is a good idea to do. We use shouldn't (should not) for what is a bad idea.
should / shouldn't + verb
Good idea ✔
You should go to the dentist. · He should rest. · We should call an ambulance.
Bad idea ✘
You shouldn't call an ambulance for a cold. · She shouldn't run on the ice.
⚠️ Remember
Should never changes: I should · she should · they should (no -s). After it we use the verb without to: you should drink water, not you should to drink.