Conjugation is the regular arrangement of the forms of the verb in the various voices
Example: Conjugation on the verb "to be"   
I am,  You are,  .....  They are    (Affirmative, Present Simple)
I have been, You have been, .....   They have been    (Affirmative, Present Perfect)
Not having been   (Negative, Past Participle)
Had I been? Had You been? .....   Had they been? (Interrogative, Past Perfect)

Popular Verbs

stay   decide   promise   wish   lie   look   open   put   find   fall   have   want   play   carry   eat   buy   will   make   hit   fall asleep   ride   walk   choose   listen   send   bring   run   use   lose   become   shall   spend   cross   hear   help   like   watch   act   do   try   sleep   forget   be   cook   can   tell   burn   die   leave   think   talk   meet   hang   speak   read   give   drink   dive   get married   borrow   swim   feel   wear   see   take   go   sell   change   come   slim   get   pass   study   remember   know   say   break   love   allow   get up   sing   start   learn   begin   lay   live   write   teach   conjugate   fly   may   wake   show   work   draw   be born   cut   win   drive   wake up   

Modal Verbs

Can (Could)    Must    Will (Would)    Shall (Should)    Ought    May (Might)