could tackle
Regular verb: tackle - tackled- tackled

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could tackle
you could tackle
she could tackle
we could tackle
you could tackle
they could tackle 	I could be tackling
you could be tackling
she could be tackling
we could be tackling
you could be tackling
they could be tackling	I could have tackled
you could have tackled
she could have tackled
we could have tackled
you could have tackled
they could have tackled	I could have been tackling
you could have been tackling
she could have been tackling
we could have been tackling
you could have been tackling
they could have been tackling	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't tackle
you couldn't tackle
she couldn't tackle
we couldn't tackle
you couldn't tackle
they couldn't tackle 	I couldn't be tackling
you couldn't be tackling
she couldn't be tackling
we couldn't be tackling
you couldn't be tackling
they couldn't be tackling	I couldn't have tackled
you couldn't have tackled
she couldn't have tackled
we couldn't have tackled
you couldn't have tackled
they couldn't have tackled	I couldn't have been tackling
you couldn't have been tackling
she couldn't have been tackling
we couldn't have been tackling
you couldn't have been tackling
they couldn't have been tackling	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I tackle?
could you tackle?
could she tackle?
could we tackle?
could you tackle?
could they tackle? 	could I be tackling?
could you be tackling?
could she be tackling?
could we be tackling?
could you be tackling?
could they be tackling? 	could I have tackled?
could you have tackled?
could she have tackled?
could we have tackled?
could you have tackled?
could they have tackled? 	could I have been tackling?
could you have been tackling?
could she have been tackling?
could we have been tackling?
could you have been tackling?
could they have been tackling? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I tackle?
couldn't you tackle?
couldn't she tackle?
couldn't we tackle?
couldn't you tackle?
couldn't they tackle? 	couldn't I be tackling?
couldn't you be tackling?
couldn't she be tackling?
couldn't we be tackling?
couldn't you be tackling?
couldn't they be tackling? 	couldn't I have tackled?
couldn't you have tackled?
couldn't she have tackled?
couldn't we have tackled?
couldn't you have tackled?
couldn't they have tackled? 	couldn't I have been tackling?
couldn't you have been tackling?
couldn't she have been tackling?
couldn't we have been tackling?
couldn't you have been tackling?
couldn't they have been tackling?