English verb conjugation
CAN WHIR

Regular verb: whir - whired - whired

Affirmation

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

Negation

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

Interrogative form

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

Interro-negative form

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