Title: Verb Tenses / Introduction to Verb Tenses

Q: Verb Tenses tell us [...] - in the [...].
     Verbs are action words and their form changes to show the tense.
     We also use words like "yesterday", "ago" or "tomorrow" to help show the tense.
There are 3 main tenses:
Past tense - for things that already happened or used to happen.
          e.g. "I played football yesterday. He watched TV last night."
Present tense - for things happening now or every day.
          e.g. "I play football. She reads books."
Future tense - for things that will happen or are going to happen.
          e.g. "I will play football tomorrow. She is going to read more books."
There are also four time types that give more details:
Simple - just the basic tense.
          e.g. "play".
Continuous - for things happening over a period of time.
          e.g. "was/were playing".
Perfect - for completed things related to other times.
          e.g. "have/has played".
Perfect Continuous - combines perfect and continuous.
          e.g. "have/has been playing".
A: when something happened; past, present or future