English verb conjugation
COULD WHIR

Regular verb: whir - whired - whired

Affirmation

Simple form	V-ing form
I could whir you could whir he could whir we could whir you could whir they could whir	I could be whiring you could be whiring he could be whiring we could be whiring you could be whiring they could be whiring
Perfect	V-ing perfect
I could have whired you could have whired he could have whired we could have whired you could have whired they could have whired	I could have been whiring you could have been whiring he could have been whiring we could have been whiring you could have been whiring they could have been whiring

Negation

Simple form	V-ing form
I couldn't whir you couldn't whir he couldn't whir we couldn't whir you couldn't whir they couldn't whir	I couldn't be whiring you couldn't be whiring he couldn't be whiring we couldn't be whiring you couldn't be whiring they couldn't be whiring
Perfect	V-ing perfect
I couldn't have whired you couldn't have whired he couldn't have whired we couldn't have whired you couldn't have whired they couldn't have whired	I couldn't have been whiring you couldn't have been whiring he couldn't have been whiring we couldn't have been whiring you couldn't have been whiring they couldn't have been whiring

Interrogative form

Simple form	V-ing form
could I whir? could you whir? could he whir? could we whir? could you whir? could they whir?	could I be whiring? could you be whiring? could he be whiring? could we be whiring? could you be whiring? could they be whiring?
Perfect	V-ing perfect
could I have whired? could you have whired? could he have whired? could we have whired? could you have whired? could they have whired?	could I have been whiring? could you have been whiring? could he have been whiring? could we have been whiring? could you have been whiring? could they have been whiring?

Interro-negative form

Simple form	V-ing form
couldn't I whir? couldn't you whir? couldn't he whir? couldn't we whir? couldn't you whir? couldn't they whir?	couldn't I be whiring? couldn't you be whiring? couldn't he be whiring? couldn't we be whiring? couldn't you be whiring? couldn't they be whiring?
Perfect	V-ing perfect
couldn't I have whired? couldn't you have whired? couldn't he have whired? couldn't we have whired? couldn't you have whired? couldn't they have whired?	couldn't I have been whiring? couldn't you have been whiring? couldn't he have been whiring? couldn't we have been whiring? couldn't you have been whiring? couldn't they have been whiring?