active verb forms

10    active verb forms    1     future, present and past; simple, progressive and perfect           English verbs can refer to future, present or past time. 
              future: She wUl see you tomorrow. 
              present: I'm watching you. 
              past: Who said that? 
          For each kind of time, there are three possibilities with most verbs: simple, 
          progressive (be+ -ing) and perfect (have+ past participle). 
              simple present: I start 
              present p'rogressive: I am starting 
              present perfect: I have started 
   2    verb forms ('tenses') and time          There is not a direct relationship between verb forms and time. For example, a 
         past verb like went is not only used to talk about past events (e.g. We went to 
         Morocco last January), but also about unreal or uncertain present or future 
         events (e.g. It would be better if we went home now). And present verbs can be 
         used to talk about the future (e.g. I'm seeing Peter tomorrow). Also, progressive 
         and perfect forms express ideas that are not simply concerned with time - for 
         example continuation, completion, present importance.