could tease
Regular verb: tease - teased- teased

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could tease
you could tease
she could tease
we could tease
you could tease
they could tease 	I could be teasing
you could be teasing
she could be teasing
we could be teasing
you could be teasing
they could be teasing	I could have teased
you could have teased
she could have teased
we could have teased
you could have teased
they could have teased	I could have been teasing
you could have been teasing
she could have been teasing
we could have been teasing
you could have been teasing
they could have been teasing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could not tease
you could not tease
she could not tease
we could not tease
you could not tease
they could not tease 	I could not be teasing
you could not be teasing
she could not be teasing
we could not be teasing
you could not be teasing
they could not be teasing	I could not have teased
you could not have teased
she could not have teased
we could not have teased
you could not have teased
they could not have teased	I could not have been teasing
you could not have been teasing
she could not have been teasing
we could not have been teasing
you could not have been teasing
they could not have been teasing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I tease?
could you tease?
could she tease?
could we tease?
could you tease?
could they tease? 	could I be teasing?
could you be teasing?
could she be teasing?
could we be teasing?
could you be teasing?
could they be teasing? 	could I have teased?
could you have teased?
could she have teased?
could we have teased?
could you have teased?
could they have teased? 	could I have been teasing?
could you have been teasing?
could she have been teasing?
could we have been teasing?
could you have been teasing?
could they have been teasing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I not tease?
could you not tease?
could she not tease?
could we not tease?
could you not tease?
could they not tease? 	could I not be teasing?
could you not be teasing?
could she not be teasing?
could we not be teasing?
could you not be teasing?
could they not be teasing? 	could I not have teased?
could you not have teased?
could she not have teased?
could we not have teased?
could you not have teased?
could they not have teased? 	could I not have been teasing?
could you not have been teasing?
could she not have been teasing?
could we not have been teasing?
could you not have been teasing?
could they not have been teasing?