can nod
Regular verb: nod - nodded- nodded

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can nod
you can nod
she can nod
we can nod
you can nod
they can nod 	I can be nodding
you can be nodding
she can be nodding
we can be nodding
you can be nodding
they can be nodding	I can have nodded
you can have nodded
she can have nodded
we can have nodded
you can have nodded
they can have nodded	I can have been nodding
you can have been nodding
she can have been nodding
we can have been nodding
you can have been nodding
they can have been nodding	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can't nod
you can't nod
she can't nod
we can't nod
you can't nod
they can't nod 	I can't be nodding
you can't be nodding
she can't be nodding
we can't be nodding
you can't be nodding
they can't be nodding	I can't have nodded
you can't have nodded
she can't have nodded
we can't have nodded
you can't have nodded
they can't have nodded	I can't have been nodding
you can't have been nodding
she can't have been nodding
we can't have been nodding
you can't have been nodding
they can't have been nodding	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I nod?
can you nod?
can she nod?
can we nod?
can you nod?
can they nod? 	can I be nodding?
can you be nodding?
can she be nodding?
can we be nodding?
can you be nodding?
can they be nodding? 	can I have nodded?
can you have nodded?
can she have nodded?
can we have nodded?
can you have nodded?
can they have nodded? 	can I have been nodding?
can you have been nodding?
can she have been nodding?
can we have been nodding?
can you have been nodding?
can they have been nodding? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can't I nod?
can't you nod?
can't she nod?
can't we nod?
can't you nod?
can't they nod? 	can't I be nodding?
can't you be nodding?
can't she be nodding?
can't we be nodding?
can't you be nodding?
can't they be nodding? 	can't I have nodded?
can't you have nodded?
can't she have nodded?
can't we have nodded?
can't you have nodded?
can't they have nodded? 	can't I have been nodding?
can't you have been nodding?
can't she have been nodding?
can't we have been nodding?
can't you have been nodding?
can't they have been nodding?