English verb conjugation
SHOULD LAST

Regular verb: last - lasted - lasted

Affirmation

Simple form	V-ing form
I'd last you'd last he'd last we'd last you'd last they'd last	I'd be lasting you'd be lasting he'd be lasting we'd be lasting you'd be lasting they'd be lasting
Perfect	V-ing perfect
I should've lasted you should've lasted he should've lasted we should've lasted you should've lasted they should've lasted	I should've been lasting you should've been lasting he should've been lasting we should've been lasting you should've been lasting they should've been lasting

Negation

Simple form	V-ing form
I shouldn't last you shouldn't last he shouldn't last we shouldn't last you shouldn't last they shouldn't last	I shouldn't be lasting you shouldn't be lasting he shouldn't be lasting we shouldn't be lasting you shouldn't be lasting they shouldn't be lasting
Perfect	V-ing perfect
I shouldn't have lasted you shouldn't have lasted he shouldn't have lasted we shouldn't have lasted you shouldn't have lasted they shouldn't have lasted	I shouldn't have been lasting you shouldn't have been lasting he shouldn't have been lasting we shouldn't have been lasting you shouldn't have been lasting they shouldn't have been lasting

Interrogative form

Simple form	V-ing form
should I last? should you last? should he last? should we last? should you last? should they last?	should I be lasting? should you be lasting? should he be lasting? should we be lasting? should you be lasting? should they be lasting?
Perfect	V-ing perfect
should I have lasted? should you have lasted? should he have lasted? should we have lasted? should you have lasted? should they have lasted?	should I have been lasting? should you have been lasting? should he have been lasting? should we have been lasting? should you have been lasting? should they have been lasting?

Interro-negative form

Simple form	V-ing form
shouldn't I last? shouldn't you last? shouldn't he last? shouldn't we last? shouldn't you last? shouldn't they last?	shouldn't I be lasting? shouldn't you be lasting? shouldn't he be lasting? shouldn't we be lasting? shouldn't you be lasting? shouldn't they be lasting?
Perfect	V-ing perfect
shouldn't I have lasted? shouldn't you have lasted? shouldn't he have lasted? shouldn't we have lasted? shouldn't you have lasted? shouldn't they have lasted?	shouldn't I have been lasting? shouldn't you have been lasting? shouldn't he have been lasting? shouldn't we have been lasting? shouldn't you have been lasting? shouldn't they have been lasting?