English verb conjugation COULD SNIFF

Regular verb: sniff - sniffed - sniffed

Affirmation

Simple form

I could sniff
you could sniff
he could sniff
we could sniff
you could sniff
they could sniff

V-ing form

I could be sniffing
you could be sniffing
he could be sniffing
we could be sniffing
you could be sniffing
they could be sniffing

Perfect

I could have sniffed
you could have sniffed
he could have sniffed
we could have sniffed
you could have sniffed
they could have sniffed

V-ing perfect

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

Negation

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

Interrogative form

Simple form

could I sniff?
could you sniff?
could he sniff?
could we sniff?
could you sniff?
could they sniff?

V-ing form

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

Perfect

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

V-ing perfect

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

Interro-negative form

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

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