can ponder
Regular verb: ponder - pondered- pondered

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can ponder
you can ponder
she can ponder
we can ponder
you can ponder
they can ponder 	I can be pondering
you can be pondering
she can be pondering
we can be pondering
you can be pondering
they can be pondering	I can have pondered
you can have pondered
she 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
she 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 	Perfect 	V-ing perfect 	
I cannot ponder
you cannot ponder
she cannot ponder
we cannot ponder
you cannot ponder
they cannot ponder 	I cannot be pondering
you cannot be pondering
she cannot be pondering
we cannot be pondering
you cannot be pondering
they cannot be pondering	I cannot have pondered
you cannot have pondered
she cannot have pondered
we cannot have pondered
you cannot have pondered
they cannot have pondered	I cannot have been pondering
you cannot have been pondering
she cannot have been pondering
we cannot have been pondering
you cannot have been pondering
they cannot have been pondering	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I ponder?
can you ponder?
can she ponder?
can we ponder?
can you ponder?
can they ponder? 	can I be pondering?
can you be pondering?
can she be pondering?
can we be pondering?
can you be pondering?
can they be pondering? 	can I have pondered?
can you have pondered?
can she 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 she 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 	Perfect 	V-ing perfect 	
can I not ponder?
can you not ponder?
can she not ponder?
can we not ponder?
can you not ponder?
can they not ponder? 	can I not be pondering?
can you not be pondering?
can she not be pondering?
can we not be pondering?
can you not be pondering?
can they not be pondering? 	can I not have pondered?
can you not have pondered?
can she not have pondered?
can we not have pondered?
can you not have pondered?
can they not have pondered? 	can I not have been pondering?
can you not have been pondering?
can she not have been pondering?
can we not have been pondering?
can you not have been pondering?
can they not have been pondering?