English verb conjugation
CAN PONDER

Regular verb: ponder - pondered - pondered

Affirmation

Simple form	V-ing form
I can ponder you can ponder he can ponder we can ponder you can ponder they can ponder	I can be pondering you can be pondering he can be pondering we can be pondering you can be pondering they can be pondering
Perfect	V-ing perfect
I can have pondered you can have pondered he can have pondered we can have pondered you can have pondered they can have pondered	I can have been pondering you can have been pondering he can have been pondering we can have been pondering you can have been pondering they can have been pondering

Negation

Simple form	V-ing form
I can't ponder you can't ponder he can't ponder we can't ponder you can't ponder they can't ponder	I can't be pondering you can't be pondering he can't be pondering we can't be pondering you can't be pondering they can't be pondering
Perfect	V-ing perfect
I can't have pondered you can't have pondered he can't have pondered we can't have pondered you can't have pondered they can't have pondered	I can't have been pondering you can't have been pondering he can't have been pondering we can't have been pondering you can't have been pondering they can't have been pondering

Interrogative form

Simple form	V-ing form
can I ponder? can you ponder? can he ponder? can we ponder? can you ponder? can they ponder?	can I be pondering? can you be pondering? can he be pondering? can we be pondering? can you be pondering? can they be pondering?
Perfect	V-ing perfect
can I have pondered? can you have pondered? can he have pondered? can we have pondered? can you have pondered? can they have pondered?	can I have been pondering? can you have been pondering? can he have been pondering? can we have been pondering? can you have been pondering? can they have been pondering?

Interro-negative form

Simple form	V-ing form
can't I ponder? can't you ponder? can't he ponder? can't we ponder? can't you ponder? can't they ponder?	can't I be pondering? can't you be pondering? can't he be pondering? can't we be pondering? can't you be pondering? can't they be pondering?
Perfect	V-ing perfect
can't I have pondered? can't you have pondered? can't he have pondered? can't we have pondered? can't you have pondered? can't they have pondered?	can't I have been pondering? can't you have been pondering? can't he have been pondering? can't we have been pondering? can't you have been pondering? can't they have been pondering?