English verb conjugation COULD FERTILIZE

Regular verb: fertilize - fertilized - fertilized

Affirmation

Simple form

I could fertilize
you could fertilize
he could fertilize
we could fertilize
you could fertilize
they could fertilize

V-ing form

I could be fertilizing
you could be fertilizing
he could be fertilizing
we could be fertilizing
you could be fertilizing
they could be fertilizing

Perfect

I could have fertilized
you could have fertilized
he could have fertilized
we could have fertilized
you could have fertilized
they could have fertilized

V-ing perfect

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

Negation

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

Interrogative form

Simple form

could I fertilize?
could you fertilize?
could he fertilize?
could we fertilize?
could you fertilize?
could they fertilize?

V-ing form

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

Perfect

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

V-ing perfect

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

Interro-negative form

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

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