should (1)

Using should and shouldn't in English

1. Form

Should and shouldn't are auxiliary (helping) verbs. They are always followed by the base form of the main verb (no -s, no -ed, no -ing).

• Affirmative: subject + should + base verb
  Example: “You should study more.” (You ought to study more.)
• Negative: subject + shouldn't + base verb
  Example: “He shouldn't eat so much sugar.” (He ought not to eat so much sugar.)
• Question: Should + subject + base verb?
  Example: “Should we leave now?” (Do you think it is a good idea to leave now?)

2. Use

Should and shouldn't are mainly used to give advice, recommendations, or opinions about what is a good or bad idea.

• Giving advice:
  “You should drink more water.” (It is a good idea.)
  “You shouldn't stay up so late.” (It is not a good idea.)
• Expressing expectations or what is likely:
  “The bus should arrive soon.” (It is expected to arrive.)
• Polite suggestions:
  “You should try that restaurant.” (A polite recommendation.)

3. Important Notes

• Do not use “to” after should.
  Incorrect: “You should to go.”
  Correct: “You should go.”
• Should does not change form for any subject.
  “I/You/He/She/We/They should rest.”