These verb forms imply future tense only karunga - करूंगा (male says -I will do) karenge - करेंगे (masculine plural subject - 'will do') jaunga - जाऊंगा (male says -I will go) ayenge. -आएंगे (masculine plural subject - 'will come') tha - था is masculine singular verb for 'to be'. it depicts past. if standalone in a sentence, it means 'was'. if used in past participle sentences, it can be understood as "had been".