could ponder
Regular verb: ponder - pondered- pondered

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could ponder
you could ponder
she could ponder
we could ponder
you could ponder
they could ponder 	I could be pondering
you could be pondering
she could be pondering
we could be pondering
you could be pondering
they could be pondering	I could have pondered
you could have pondered
she could have pondered
we could have pondered
you could have pondered
they could have pondered	I could have been pondering
you could have been pondering
she could have been pondering
we could have been pondering
you could have been pondering
they could have been pondering	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't ponder
you couldn't ponder
she couldn't ponder
we couldn't ponder
you couldn't ponder
they couldn't ponder 	I couldn't be pondering
you couldn't be pondering
she couldn't be pondering
we couldn't be pondering
you couldn't be pondering
they couldn't be pondering	I couldn't have pondered
you couldn't have pondered
she couldn't have pondered
we couldn't have pondered
you couldn't have pondered
they couldn't have pondered	I couldn't have been pondering
you couldn't have been pondering
she couldn't have been pondering
we couldn't have been pondering
you couldn't have been pondering
they couldn't have been pondering	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I ponder?
could you ponder?
could she ponder?
could we ponder?
could you ponder?
could they ponder? 	could I be pondering?
could you be pondering?
could she be pondering?
could we be pondering?
could you be pondering?
could they be pondering? 	could I have pondered?
could you have pondered?
could she have pondered?
could we have pondered?
could you have pondered?
could they have pondered? 	could I have been pondering?
could you have been pondering?
could she have been pondering?
could we have been pondering?
could you have been pondering?
could they have been pondering? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I ponder?
couldn't you ponder?
couldn't she ponder?
couldn't we ponder?
couldn't you ponder?
couldn't they ponder? 	couldn't I be pondering?
couldn't you be pondering?
couldn't she be pondering?
couldn't we be pondering?
couldn't you be pondering?
couldn't they be pondering? 	couldn't I have pondered?
couldn't you have pondered?
couldn't she have pondered?
couldn't we have pondered?
couldn't you have pondered?
couldn't they have pondered? 	couldn't I have been pondering?
couldn't you have been pondering?
couldn't she have been pondering?
couldn't we have been pondering?
couldn't you have been pondering?
couldn't they have been pondering?