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