could tickle
Regular verb: tickle - tickled- tickled

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could tickle
you could tickle
he could tickle
we could tickle
you could tickle
they could tickle 	I could be tickling
you could be tickling
he could be tickling
we could be tickling
you could be tickling
they could be tickling	I could have tickled
you could have tickled
he could have tickled
we could have tickled
you could have tickled
they could have tickled	I could have been tickling
you could have been tickling
he could have been tickling
we could have been tickling
you could have been tickling
they could have been tickling	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't tickle
you couldn't tickle
he couldn't tickle
we couldn't tickle
you couldn't tickle
they couldn't tickle 	I couldn't be tickling
you couldn't be tickling
he couldn't be tickling
we couldn't be tickling
you couldn't be tickling
they couldn't be tickling	I couldn't have tickled
you couldn't have tickled
he couldn't have tickled
we couldn't have tickled
you couldn't have tickled
they couldn't have tickled	I couldn't have been tickling
you couldn't have been tickling
he couldn't have been tickling
we couldn't have been tickling
you couldn't have been tickling
they couldn't have been tickling	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I tickle?
could you tickle?
could he tickle?
could we tickle?
could you tickle?
could they tickle? 	could I be tickling?
could you be tickling?
could he be tickling?
could we be tickling?
could you be tickling?
could they be tickling? 	could I have tickled?
could you have tickled?
could he have tickled?
could we have tickled?
could you have tickled?
could they have tickled? 	could I have been tickling?
could you have been tickling?
could he have been tickling?
could we have been tickling?
could you have been tickling?
could they have been tickling? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I tickle?
couldn't you tickle?
couldn't he tickle?
couldn't we tickle?
couldn't you tickle?
couldn't they tickle? 	couldn't I be tickling?
couldn't you be tickling?
couldn't he be tickling?
couldn't we be tickling?
couldn't you be tickling?
couldn't they be tickling? 	couldn't I have tickled?
couldn't you have tickled?
couldn't he have tickled?
couldn't we have tickled?
couldn't you have tickled?
couldn't they have tickled? 	couldn't I have been tickling?
couldn't you have been tickling?
couldn't he have been tickling?
couldn't we have been tickling?
couldn't you have been tickling?
couldn't they have been tickling?