English verb conjugation
CAN CLASH

Regular verb: clash - clashed - clashed

Affirmation

Simple form	V-ing form
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
Perfect	V-ing perfect
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
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
Perfect	V-ing perfect
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
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?
Perfect	V-ing perfect
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
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?
Perfect	V-ing perfect
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?