can clash
Regular verb: clash - clashed- clashed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can clash
you can clash
he can clash
we can clash
you can clash
they can clash 	I can be clashing
you can be clashing
he can be clashing
we can be clashing
you can be clashing
they can be clashing	I can have clashed
you can have clashed
he can have clashed
we can have clashed
you can have clashed
they can have clashed	I can have been clashing
you can have been clashing
he can have been clashing
we can have been clashing
you can have been clashing
they can have been clashing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can't clash
you can't clash
he can't clash
we can't clash
you can't clash
they can't clash 	I can't be clashing
you can't be clashing
he can't be clashing
we can't be clashing
you can't be clashing
they can't be clashing	I can't have clashed
you can't have clashed
he can't have clashed
we can't have clashed
you can't have clashed
they can't have clashed	I can't have been clashing
you can't have been clashing
he can't have been clashing
we can't have been clashing
you can't have been clashing
they can't have been clashing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I clash?
can you clash?
can he clash?
can we clash?
can you clash?
can they clash? 	can I be clashing?
can you be clashing?
can he be clashing?
can we be clashing?
can you be clashing?
can they be clashing? 	can I have clashed?
can you have clashed?
can he have clashed?
can we have clashed?
can you have clashed?
can they have clashed? 	can I have been clashing?
can you have been clashing?
can he have been clashing?
can we have been clashing?
can you have been clashing?
can they have been clashing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can't I clash?
can't you clash?
can't he clash?
can't we clash?
can't you clash?
can't they clash? 	can't I be clashing?
can't you be clashing?
can't he be clashing?
can't we be clashing?
can't you be clashing?
can't they be clashing? 	can't I have clashed?
can't you have clashed?
can't he have clashed?
can't we have clashed?
can't you have clashed?
can't they have clashed? 	can't I have been clashing?
can't you have been clashing?
can't he have been clashing?
can't we have been clashing?
can't you have been clashing?
can't they have been clashing?