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