could strike
Irregular verb: strike - struck- struck, stricken

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could strike
you could strike
he could strike
we could strike
you could strike
they could strike 	I could be striking
you could be striking
he could be striking
we could be striking
you could be striking
they could be striking	I could have struck, stricken
you could have struck, stricken
he could have struck, stricken
we could have struck, stricken
you could have struck, stricken
they could have struck, stricken	I could have been striking
you could have been striking
he could have been striking
we could have been striking
you could have been striking
they could have been striking	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't strike
you couldn't strike
he couldn't strike
we couldn't strike
you couldn't strike
they couldn't strike 	I couldn't be striking
you couldn't be striking
he couldn't be striking
we couldn't be striking
you couldn't be striking
they couldn't be striking	I couldn't have struck, stricken
you couldn't have struck, stricken
he couldn't have struck, stricken
we couldn't have struck, stricken
you couldn't have struck, stricken
they couldn't have struck, stricken	I couldn't have been striking
you couldn't have been striking
he couldn't have been striking
we couldn't have been striking
you couldn't have been striking
they couldn't have been striking	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I strike?
could you strike?
could he strike?
could we strike?
could you strike?
could they strike? 	could I be striking?
could you be striking?
could he be striking?
could we be striking?
could you be striking?
could they be striking? 	could I have struck, stricken?
could you have struck, stricken?
could he have struck, stricken?
could we have struck, stricken?
could you have struck, stricken?
could they have struck, stricken? 	could I have been striking?
could you have been striking?
could he have been striking?
could we have been striking?
could you have been striking?
could they have been striking? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I strike?
couldn't you strike?
couldn't he strike?
couldn't we strike?
couldn't you strike?
couldn't they strike? 	couldn't I be striking?
couldn't you be striking?
couldn't he be striking?
couldn't we be striking?
couldn't you be striking?
couldn't they be striking? 	couldn't I have struck, stricken?
couldn't you have struck, stricken?
couldn't he have struck, stricken?
couldn't we have struck, stricken?
couldn't you have struck, stricken?
couldn't they have struck, stricken? 	couldn't I have been striking?
couldn't you have been striking?
couldn't he have been striking?
couldn't we have been striking?
couldn't you have been striking?
couldn't they have been striking?