I can snowplow you can snowplow she can snowplow we can snowplow you can snowplow they can snowplow
V-ing form
I can be snowplowing you can be snowplowing she can be snowplowing we can be snowplowing you can be snowplowing they can be snowplowing
Perfect
I can have snowplowed you can have snowplowed she can have snowplowed we can have snowplowed you can have snowplowed they can have snowplowed
V-ing perfect
I can have been snowplowing you can have been snowplowing she can have been snowplowing we can have been snowplowing you can have been snowplowing they can have been snowplowing
Negation
Simple form
I can't snowplow you can't snowplow she can't snowplow we can't snowplow you can't snowplow they can't snowplow
V-ing form
I can't be snowplowing you can't be snowplowing she can't be snowplowing we can't be snowplowing you can't be snowplowing they can't be snowplowing
Perfect
I can't have snowplowed you can't have snowplowed she can't have snowplowed we can't have snowplowed you can't have snowplowed they can't have snowplowed
V-ing perfect
I can't have been snowplowing you can't have been snowplowing she can't have been snowplowing we can't have been snowplowing you can't have been snowplowing they can't have been snowplowing
Interrogative form
Simple form
can I snowplow? can you snowplow? can she snowplow? can we snowplow? can you snowplow? can they snowplow?
V-ing form
can I be snowplowing? can you be snowplowing? can she be snowplowing? can we be snowplowing? can you be snowplowing? can they be snowplowing?
Perfect
can I have snowplowed? can you have snowplowed? can she have snowplowed? can we have snowplowed? can you have snowplowed? can they have snowplowed?
V-ing perfect
can I have been snowplowing? can you have been snowplowing? can she have been snowplowing? can we have been snowplowing? can you have been snowplowing? can they have been snowplowing?
Interro-negative form
Simple form
can't I snowplow? can't you snowplow? can't she snowplow? can't we snowplow? can't you snowplow? can't they snowplow?
V-ing form
can't I be snowplowing? can't you be snowplowing? can't she be snowplowing? can't we be snowplowing? can't you be snowplowing? can't they be snowplowing?
Perfect
can't I have snowplowed? can't you have snowplowed? can't she have snowplowed? can't we have snowplowed? can't you have snowplowed? can't they have snowplowed?
V-ing perfect
can't I have been snowplowing? can't you have been snowplowing? can't she have been snowplowing? can't we have been snowplowing? can't you have been snowplowing? can't they have been snowplowing?