English verb conjugation COULD FERTILIZE

Regular verb: fertilize - fertilized - fertilized

Affirmation

Simple form

I could fertilize
you could fertilize
she could fertilize
we could fertilize
you could fertilize
they could fertilize

V-ing form

I could be fertilizing
you could be fertilizing
she could be fertilizing
we could be fertilizing
you could be fertilizing
they could be fertilizing

Perfect

I could have fertilized
you could have fertilized
she 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
she 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
she 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
she 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
she 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
she 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 she fertilize?
could we fertilize?
could you fertilize?
could they fertilize?

V-ing form

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

Perfect

could I have fertilized?
could you have fertilized?
could she 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 she 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 she 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 she 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 she 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 she 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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