A. Tense

-According to the time, tenses  are three types.

1.present tense

  -present tense also four types: 

   a. Present indefinite tense.

   b  present continuous tense.

   c.  Present perfect tense. 

   d.  Present perfect continuous tense.

2. Past tense. 

         - past tense also four types:

    a. Past indefinite tense. 

    b. Past continuous tense. 

    c. Past perfect tense. 

    d. Past perfect continuous tense. 

3. Future tense. 

       -future tense also four types:

    a. Future indefinite tense. 

    b. Future continuous tense.

    c. Future perfect tense. 

    d. Future perfect continuous tense