I'll be substituting you'll be substituting he'll be substituting we'll be substituting you'll be substituting they'll be substituting
Future perfect
I'll have substituted you'll have substituted he'll have substituted we'll have substituted you'll have substituted they'll have substituted
Future perfect continuous
I'll have been substituting you'll have been substituting he'll have been substituting we'll have been substituting you'll have been substituting they'll have been substituting
I'd be substituting you'd be substituting he'd be substituting we'd be substituting you'd be substituting they'd be substituting
Past
I'd have substituted you'd have substituted he'd have substituted we'd have substituted you'd have substituted they'd have substituted
Past continuous
I'd have been substituting you'd have been substituting he'd have been substituting we'd have been substituting you'd have been substituting they'd have been substituting