Present indefinite tense

A verb which shows that an action takes place at the present moment  is called Present indefinite tense

Helping verbs:  do and does9used for negative and interrogative sentences with 1st form of the verbs

example :affirmative sentences,

1.                 I write a lesson  
2.                         we write a lesson 
3.                         you write a lesson
4.                         he writes a lesson
5.                        she writes a lesson
6.                        it writes a lesson
7.                      they write a lesson

Negative,

1.                 I do not write a lesson  
2.                         we do not write a lesson 
3.                         you do not write a lesson
4.                         he does not  writes a lesson
5.                        she does not writes a lesson
6.                        it does not  writes a lesson
7.                      they do not write a lesson

Interrogative, 

1.      do   I write a lesson  
2.      do  we write a lesson 
3.      do  you write a lesson
4.       does   he writes a lesson
5.      does  she writes a lesson
6.       does  it writes a lesson
7.        do   they write a lesson