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