can blunder
Regular verb: blunder - blundered- blundered

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can blunder
you can blunder
he can blunder
we can blunder
you can blunder
they can blunder 	I can be blundering
you can be blundering
he can be blundering
we can be blundering
you can be blundering
they can be blundering	I can have blundered
you can have blundered
he can have blundered
we can have blundered
you can have blundered
they can have blundered	I can have been blundering
you can have been blundering
he can have been blundering
we can have been blundering
you can have been blundering
they can have been blundering	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can't blunder
you can't blunder
he can't blunder
we can't blunder
you can't blunder
they can't blunder 	I can't be blundering
you can't be blundering
he can't be blundering
we can't be blundering
you can't be blundering
they can't be blundering	I can't have blundered
you can't have blundered
he can't have blundered
we can't have blundered
you can't have blundered
they can't have blundered	I can't have been blundering
you can't have been blundering
he can't have been blundering
we can't have been blundering
you can't have been blundering
they can't have been blundering	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I blunder?
can you blunder?
can he blunder?
can we blunder?
can you blunder?
can they blunder? 	can I be blundering?
can you be blundering?
can he be blundering?
can we be blundering?
can you be blundering?
can they be blundering? 	can I have blundered?
can you have blundered?
can he have blundered?
can we have blundered?
can you have blundered?
can they have blundered? 	can I have been blundering?
can you have been blundering?
can he have been blundering?
can we have been blundering?
can you have been blundering?
can they have been blundering? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can't I blunder?
can't you blunder?
can't he blunder?
can't we blunder?
can't you blunder?
can't they blunder? 	can't I be blundering?
can't you be blundering?
can't he be blundering?
can't we be blundering?
can't you be blundering?
can't they be blundering? 	can't I have blundered?
can't you have blundered?
can't he have blundered?
can't we have blundered?
can't you have blundered?
can't they have blundered? 	can't I have been blundering?
can't you have been blundering?
can't he have been blundering?
can't we have been blundering?
can't you have been blundering?
can't they have been blundering?