English verb conjugation COULD DETERIORATE

Regular verb: deteriorate - deteriorated - deteriorated

Affirmation

Simple form

I could deteriorate
you could deteriorate
he could deteriorate
we could deteriorate
you could deteriorate
they could deteriorate

V-ing form

I could be deteriorating
you could be deteriorating
he could be deteriorating
we could be deteriorating
you could be deteriorating
they could be deteriorating

Perfect

I could have deteriorated
you could have deteriorated
he could have deteriorated
we could have deteriorated
you could have deteriorated
they could have deteriorated

V-ing perfect

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

Negation

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

Interrogative form

Simple form

could I deteriorate?
could you deteriorate?
could he deteriorate?
could we deteriorate?
could you deteriorate?
could they deteriorate?

V-ing form

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

Perfect

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

V-ing perfect

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

Interro-negative form

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

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