English verb conjugation COULD LAST

Regular verb: last - lasted - lasted

Affirmation

Simple form

I could last
you could last
he could last
we could last
you could last
they could last

V-ing form

I could be lasting
you could be lasting
he could be lasting
we could be lasting
you could be lasting
they could be lasting

Perfect

I could have lasted
you could have lasted
he could have lasted
we could have lasted
you could have lasted
they could have lasted

V-ing perfect

I could have been lasting
you could have been lasting
he could have been lasting
we could have been lasting
you could have been lasting
they could have been lasting

Negation

Simple form

I couldn't last
you couldn't last
he couldn't last
we couldn't last
you couldn't last
they couldn't last

V-ing form

I couldn't be lasting
you couldn't be lasting
he couldn't be lasting
we couldn't be lasting
you couldn't be lasting
they couldn't be lasting

Perfect

I couldn't have lasted
you couldn't have lasted
he couldn't have lasted
we couldn't have lasted
you couldn't have lasted
they couldn't have lasted

V-ing perfect

I couldn't have been lasting
you couldn't have been lasting
he couldn't have been lasting
we couldn't have been lasting
you couldn't have been lasting
they couldn't have been lasting

Interrogative form

Simple form

could I last?
could you last?
could he last?
could we last?
could you last?
could they last?

V-ing form

could I be lasting?
could you be lasting?
could he be lasting?
could we be lasting?
could you be lasting?
could they be lasting?

Perfect

could I have lasted?
could you have lasted?
could he have lasted?
could we have lasted?
could you have lasted?
could they have lasted?

V-ing perfect

could I have been lasting?
could you have been lasting?
could he have been lasting?
could we have been lasting?
could you have been lasting?
could they have been lasting?

Interro-negative form

Simple form

couldn't I last?
couldn't you last?
couldn't he last?
couldn't we last?
couldn't you last?
couldn't they last?

V-ing form

couldn't I be lasting?
couldn't you be lasting?
couldn't he be lasting?
couldn't we be lasting?
couldn't you be lasting?
couldn't they be lasting?

Perfect

couldn't I have lasted?
couldn't you have lasted?
couldn't he have lasted?
couldn't we have lasted?
couldn't you have lasted?
couldn't they have lasted?

V-ing perfect

couldn't I have been lasting?
couldn't you have been lasting?
couldn't he have been lasting?
couldn't we have been lasting?
couldn't you have been lasting?
couldn't they have been lasting?

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