English verb conjugation
COULD BLUNDER

Regular verb: blunder - blundered - blundered

Affirmation

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

Negation

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

Interrogative form

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

Interro-negative form

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