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