tenses

• Present simple?


  I walk
• Past simple?


  I walked
• Future simple?

  I will walk
• Simple tense?


  The simple tense states a fact, expresses than an action has taken place in the past, present or future.
• Perfect aspect?


  Expresses a completed action.
• What auxiliary verbs does the perfect tense use?

  Had, has, or will have.
• Past perfect?

  I had walked
• Present perfect?

  I have walked
• Future perfect?

  I will have walked
• Continuous tense?

  Expresses an ongoing, uncompleted action.
• What verbs does the continuous tense use?

  'To be'
• Past continuous?


  I was walking
• Present continuous?


  I am walking
• Future continuous?


  I will be walking
• Perfect continuous?


  Expresses an action that has started in the past and is continuing into the present.
• A perfect continuous sentence is formed with the auxiliary 'have, has, had' with the auxiliary verb 'been'
• Past perfect continuous?


  I had been walking
• Present perfect continuous?


  I have been walking
• Future perfect continuous?

  I will have been walking