Rules of Conjugation - basics

The subjects are classified into three Persons. The conjugation for verbs will vary based on the person as well as the tense.

First Person	I, We	उत्तम पुरुष
Second Person	Thou, You	मध्यम पुरुष
Third Person	He, She, It, They	प्रथम पुरुष

Under each person there are three numbers - singular, dual (only two) and plural. When a Root is conjugated, to form the verb, it has to add or append to itself the TENSE sign for the specific number under the specific person.

For example:
Two people have run - The verb is run, the tense is Past tense, the person is "Third Person" and the number is dual.  This will have an unique sign to be added to the Root धाव (to run) to make the correct verb.
The TENSE signs are also different based on the different classes (parasme pada vs aatmane pada).