can smash
Regular verb: smash - smashed- smashed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can smash
you can smash
he can smash
we can smash
you can smash
they can smash 	I can be smashing
you can be smashing
he can be smashing
we can be smashing
you can be smashing
they can be smashing	I can have smashed
you can have smashed
he can have smashed
we can have smashed
you can have smashed
they can have smashed	I can have been smashing
you can have been smashing
he can have been smashing
we can have been smashing
you can have been smashing
they can have been smashing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I cannot smash
you cannot smash
he cannot smash
we cannot smash
you cannot smash
they cannot smash 	I cannot be smashing
you cannot be smashing
he cannot be smashing
we cannot be smashing
you cannot be smashing
they cannot be smashing	I cannot have smashed
you cannot have smashed
he cannot have smashed
we cannot have smashed
you cannot have smashed
they cannot have smashed	I cannot have been smashing
you cannot have been smashing
he cannot have been smashing
we cannot have been smashing
you cannot have been smashing
they cannot have been smashing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I smash?
can you smash?
can he smash?
can we smash?
can you smash?
can they smash? 	can I be smashing?
can you be smashing?
can he be smashing?
can we be smashing?
can you be smashing?
can they be smashing? 	can I have smashed?
can you have smashed?
can he have smashed?
can we have smashed?
can you have smashed?
can they have smashed? 	can I have been smashing?
can you have been smashing?
can he have been smashing?
can we have been smashing?
can you have been smashing?
can they have been smashing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I not smash?
can you not smash?
can he not smash?
can we not smash?
can you not smash?
can they not smash? 	can I not be smashing?
can you not be smashing?
can he not be smashing?
can we not be smashing?
can you not be smashing?
can they not be smashing? 	can I not have smashed?
can you not have smashed?
can he not have smashed?
can we not have smashed?
can you not have smashed?
can they not have smashed? 	can I not have been smashing?
can you not have been smashing?
can he not have been smashing?
can we not have been smashing?
can you not have been smashing?
can they not have been smashing?