Question

what is the meaning of auxiliaries and main verb

Answer 1

Auxililaries means a helping verb like
Is playing
were sleeping
here is and were are auxililaries and main verb is playing and sleeping

Answer 2

This is called main verb....
A verb using in forming the tenses or moods and voices of other verbs. The primary verb in English are be, do and have is called auxiliaries...
Hope this helps....