खाद् (१ परस्मैपद) means "To eat".
According to "Subject", "Verb" will change. So these are the simple following examples :-
1) I am eating = अहं खादामि (ahaṃ khādāmi)।
2) He/She is eating = सः/सा खादति (saḥ/sā khādati)।
3) They are eating = ते खादन्ति (te khādanti)।