I can lactate you can lactate she can lactate we can lactate you can lactate they can lactate
V-ing form
I can be lactating you can be lactating she can be lactating we can be lactating you can be lactating they can be lactating
Perfect
I can have lactated you can have lactated she can have lactated we can have lactated you can have lactated they can have lactated
V-ing perfect
I can have been lactating you can have been lactating she can have been lactating we can have been lactating you can have been lactating they can have been lactating
Negation
Simple form
I can't lactate you can't lactate she can't lactate we can't lactate you can't lactate they can't lactate
V-ing form
I can't be lactating you can't be lactating she can't be lactating we can't be lactating you can't be lactating they can't be lactating
Perfect
I can't have lactated you can't have lactated she can't have lactated we can't have lactated you can't have lactated they can't have lactated
V-ing perfect
I can't have been lactating you can't have been lactating she can't have been lactating we can't have been lactating you can't have been lactating they can't have been lactating
Interrogative form
Simple form
can I lactate? can you lactate? can she lactate? can we lactate? can you lactate? can they lactate?
V-ing form
can I be lactating? can you be lactating? can she be lactating? can we be lactating? can you be lactating? can they be lactating?
Perfect
can I have lactated? can you have lactated? can she have lactated? can we have lactated? can you have lactated? can they have lactated?
V-ing perfect
can I have been lactating? can you have been lactating? can she have been lactating? can we have been lactating? can you have been lactating? can they have been lactating?
Interro-negative form
Simple form
can't I lactate? can't you lactate? can't she lactate? can't we lactate? can't you lactate? can't they lactate?
V-ing form
can't I be lactating? can't you be lactating? can't she be lactating? can't we be lactating? can't you be lactating? can't they be lactating?
Perfect
can't I have lactated? can't you have lactated? can't she have lactated? can't we have lactated? can't you have lactated? can't they have lactated?
V-ing perfect
can't I have been lactating? can't you have been lactating? can't she have been lactating? can't we have been lactating? can't you have been lactating? can't they have been lactating?