English Tens in my opinion

English tenses mathematically


Indication= "S" for subject,  "V" for verb,     "O" for object,      "HP" for Helping verb, 

                      "V1,V2,V3" for  verb {first form,2nd form, 3rd form}

Tens   simple continuous perfect P-continuous
   Present            S+V.1+O         S+HP+V+Ing+O      S+have-been+V3+O S+have-  been+V+ing+O
   Past           S+V.2+O         S+had+V+Ing+O      S+had-been+V3+O   S+had-been+V+ing+O
   Future            S+will or shall.V1+O         S+will or shall+be+V+Ing+O      S+will or shall+have+V3+O   S+will or shall-have-been+V+ing+O