English verb conjugation
COULD TACKLE

Regular verb: tackle - tackled - tackled

Affirmation

Simple form	V-ing form
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
Perfect	V-ing perfect
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
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
Perfect	V-ing perfect
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
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?
Perfect	V-ing perfect
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
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?
Perfect	V-ing perfect
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?