I can float you can float he can float we can float you can float they can float
V-ing form
I can be floating you can be floating he can be floating we can be floating you can be floating they can be floating
Perfect
I can have floated you can have floated he can have floated we can have floated you can have floated they can have floated
V-ing perfect
I can have been floating you can have been floating he can have been floating we can have been floating you can have been floating they can have been floating
Negation
Simple form
I cannot float you cannot float he cannot float we cannot float you cannot float they cannot float
V-ing form
I cannot be floating you cannot be floating he cannot be floating we cannot be floating you cannot be floating they cannot be floating
Perfect
I cannot have floated you cannot have floated he cannot have floated we cannot have floated you cannot have floated they cannot have floated
V-ing perfect
I cannot have been floating you cannot have been floating he cannot have been floating we cannot have been floating you cannot have been floating they cannot have been floating
Interrogative form
Simple form
can I float? can you float? can he float? can we float? can you float? can they float?
V-ing form
can I be floating? can you be floating? can he be floating? can we be floating? can you be floating? can they be floating?
Perfect
can I have floated? can you have floated? can he have floated? can we have floated? can you have floated? can they have floated?
V-ing perfect
can I have been floating? can you have been floating? can he have been floating? can we have been floating? can you have been floating? can they have been floating?
Interro-negative form
Simple form
can I not float? can you not float? can he not float? can we not float? can you not float? can they not float?
V-ing form
can I not be floating? can you not be floating? can he not be floating? can we not be floating? can you not be floating? can they not be floating?
Perfect
can I not have floated? can you not have floated? can he not have floated? can we not have floated? can you not have floated? can they not have floated?
V-ing perfect
can I not have been floating? can you not have been floating? can he not have been floating? can we not have been floating? can you not have been floating? can they not have been floating?