Ought to

Examples:

Affirmative

• Helen ought to be more careful.
  
• I ought to stay in bed.
  
• We ought to go together.
  
• They ought to be here already.
  
• You ought to eat more vegetables.
  
• Tom ought to take her home..
• It ought to work properly.
  

Negative

• You ought not to drink so much.
  
• They ought not to go camping without a torch.
  
• George ought not to wear someone else's glasses.
  

Interrogative

• Ought Rachel to be here so early?
  
• Ought they to live there?