Past, present and future are grammatical tense but these three are profoundly related with the lifetimes of human being

Past, present and future; Known as tense,

Physiologically they have profound co-ordinance,

Human being has a lot of lifetimes;

Past, present and future are fundamental and prime,

Past last day; present today and future tomorrow;

Present is most useful as it future grow,

Which is present today tomorrow that past;

Give much priority to present at first,

Past help to learn; to think some better;

Present makes the platform of future’s matter,

Result of past always come into present;

Good acts of present makes future pleasant,

Past present and future; reside in a line;

Creation of present makes future very fine,

Evaluate the past and apply at present;

Present time of life is much significant,

Past was bad but present may be good;

Present is bad but future may be rude,

Past related to mind but present is physique;

Extreme future is death according to logic.

.