Should

Should is one of the most important modal verbs in English.STRUCTURE

PresentSubject        +        Should        +        Base Verb

• She should study more often.
  
• They should go inside.
  

PastSubject        +        Should        +        Have       +        Past Participle

• She should have studied more often.
  
• We should be quiet.
  

USES 

Recommendations

• You should see the new Spiderman movie.
  
• You should try this ice cream.
  

Advice

• You should eat less sugar.
  
• You should not smoke.
  

Obligation

• I should get back to work.
  
• We shouldn't be here.

Questions 

Reverse should and the verb to ask questions:Advice

• Should I study chapter 1 or chapter 2?
  
• How should I invest my money?
  

Expectations

• Should the dog be allowed in the house?