can pinnacle
Regular verb: pinnacle - pinnacled- pinnacled

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can pinnacle
you can pinnacle
he can pinnacle
we can pinnacle
you can pinnacle
they can pinnacle 	I can be pinnacling
you can be pinnacling
he can be pinnacling
we can be pinnacling
you can be pinnacling
they can be pinnacling	I can have pinnacled
you can have pinnacled
he can have pinnacled
we can have pinnacled
you can have pinnacled
they can have pinnacled	I can have been pinnacling
you can have been pinnacling
he can have been pinnacling
we can have been pinnacling
you can have been pinnacling
they can have been pinnacling	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can't pinnacle
you can't pinnacle
he can't pinnacle
we can't pinnacle
you can't pinnacle
they can't pinnacle 	I can't be pinnacling
you can't be pinnacling
he can't be pinnacling
we can't be pinnacling
you can't be pinnacling
they can't be pinnacling	I can't have pinnacled
you can't have pinnacled
he can't have pinnacled
we can't have pinnacled
you can't have pinnacled
they can't have pinnacled	I can't have been pinnacling
you can't have been pinnacling
he can't have been pinnacling
we can't have been pinnacling
you can't have been pinnacling
they can't have been pinnacling	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I pinnacle?
can you pinnacle?
can he pinnacle?
can we pinnacle?
can you pinnacle?
can they pinnacle? 	can I be pinnacling?
can you be pinnacling?
can he be pinnacling?
can we be pinnacling?
can you be pinnacling?
can they be pinnacling? 	can I have pinnacled?
can you have pinnacled?
can he have pinnacled?
can we have pinnacled?
can you have pinnacled?
can they have pinnacled? 	can I have been pinnacling?
can you have been pinnacling?
can he have been pinnacling?
can we have been pinnacling?
can you have been pinnacling?
can they have been pinnacling? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can't I pinnacle?
can't you pinnacle?
can't he pinnacle?
can't we pinnacle?
can't you pinnacle?
can't they pinnacle? 	can't I be pinnacling?
can't you be pinnacling?
can't he be pinnacling?
can't we be pinnacling?
can't you be pinnacling?
can't they be pinnacling? 	can't I have pinnacled?
can't you have pinnacled?
can't he have pinnacled?
can't we have pinnacled?
can't you have pinnacled?
can't they have pinnacled? 	can't I have been pinnacling?
can't you have been pinnacling?
can't he have been pinnacling?
can't we have been pinnacling?
can't you have been pinnacling?
can't they have been pinnacling?