can grab
Regular verb: grab - grabbed- grabbed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can grab
you can grab
he can grab
we can grab
you can grab
they can grab 	I can be grabbing
you can be grabbing
he can be grabbing
we can be grabbing
you can be grabbing
they can be grabbing	I can have grabbed
you can have grabbed
he can have grabbed
we can have grabbed
you can have grabbed
they can have grabbed	I can have been grabbing
you can have been grabbing
he can have been grabbing
we can have been grabbing
you can have been grabbing
they can have been grabbing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I cannot grab
you cannot grab
he cannot grab
we cannot grab
you cannot grab
they cannot grab 	I cannot be grabbing
you cannot be grabbing
he cannot be grabbing
we cannot be grabbing
you cannot be grabbing
they cannot be grabbing	I cannot have grabbed
you cannot have grabbed
he cannot have grabbed
we cannot have grabbed
you cannot have grabbed
they cannot have grabbed	I cannot have been grabbing
you cannot have been grabbing
he cannot have been grabbing
we cannot have been grabbing
you cannot have been grabbing
they cannot have been grabbing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I grab?
can you grab?
can he grab?
can we grab?
can you grab?
can they grab? 	can I be grabbing?
can you be grabbing?
can he be grabbing?
can we be grabbing?
can you be grabbing?
can they be grabbing? 	can I have grabbed?
can you have grabbed?
can he have grabbed?
can we have grabbed?
can you have grabbed?
can they have grabbed? 	can I have been grabbing?
can you have been grabbing?
can he have been grabbing?
can we have been grabbing?
can you have been grabbing?
can they have been grabbing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I not grab?
can you not grab?
can he not grab?
can we not grab?
can you not grab?
can they not grab? 	can I not be grabbing?
can you not be grabbing?
can he not be grabbing?
can we not be grabbing?
can you not be grabbing?
can they not be grabbing? 	can I not have grabbed?
can you not have grabbed?
can he not have grabbed?
can we not have grabbed?
can you not have grabbed?
can they not have grabbed? 	can I not have been grabbing?
can you not have been grabbing?
can he not have been grabbing?
can we not have been grabbing?
can you not have been grabbing?
can they not have been grabbing?