TENSE

tense
past
present
future

past:
simple past:s#v3#o
past continuous :s#was/were#o
past perfect:s#had#v3#o
past pertect continuous : s#had been#v4(ing)#o

present
simple present:s#v1#o
present continuous :s#is/am/are#v4#o
perfect:s#has/have been#v3#o
present pertect continuous : s#had been#v4(ing)#o

future
simple future:s#will shall #v1#o
future continuous:s#will/shall be v4(ing)#o
perfect future:s#will have been#v3#o
future pertect continuous : s#will/shall have been#v4(ing)#ohttps://youtu.be/JqGWvYiOpAM