can tether
Regular verb: tether - tethered- tethered

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can tether
you can tether
she can tether
we can tether
you can tether
they can tether 	I can be tethering
you can be tethering
she can be tethering
we can be tethering
you can be tethering
they can be tethering	I can have tethered
you can have tethered
she can have tethered
we can have tethered
you can have tethered
they can have tethered	I can have been tethering
you can have been tethering
she can have been tethering
we can have been tethering
you can have been tethering
they can have been tethering	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can't tether
you can't tether
she can't tether
we can't tether
you can't tether
they can't tether 	I can't be tethering
you can't be tethering
she can't be tethering
we can't be tethering
you can't be tethering
they can't be tethering	I can't have tethered
you can't have tethered
she can't have tethered
we can't have tethered
you can't have tethered
they can't have tethered	I can't have been tethering
you can't have been tethering
she can't have been tethering
we can't have been tethering
you can't have been tethering
they can't have been tethering	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I tether?
can you tether?
can she tether?
can we tether?
can you tether?
can they tether? 	can I be tethering?
can you be tethering?
can she be tethering?
can we be tethering?
can you be tethering?
can they be tethering? 	can I have tethered?
can you have tethered?
can she have tethered?
can we have tethered?
can you have tethered?
can they have tethered? 	can I have been tethering?
can you have been tethering?
can she have been tethering?
can we have been tethering?
can you have been tethering?
can they have been tethering? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can't I tether?
can't you tether?
can't she tether?
can't we tether?
can't you tether?
can't they tether? 	can't I be tethering?
can't you be tethering?
can't she be tethering?
can't we be tethering?
can't you be tethering?
can't they be tethering? 	can't I have tethered?
can't you have tethered?
can't she have tethered?
can't we have tethered?
can't you have tethered?
can't they have tethered? 	can't I have been tethering?
can't you have been tethering?
can't she have been tethering?
can't we have been tethering?
can't you have been tethering?
can't they have been tethering?