could skirmish
Regular verb: skirmish - skirmished- skirmished

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could skirmish
you could skirmish
he could skirmish
we could skirmish
you could skirmish
they could skirmish 	I could be skirmishing
you could be skirmishing
he could be skirmishing
we could be skirmishing
you could be skirmishing
they could be skirmishing	I could have skirmished
you could have skirmished
he could have skirmished
we could have skirmished
you could have skirmished
they could have skirmished	I could have been skirmishing
you could have been skirmishing
he could have been skirmishing
we could have been skirmishing
you could have been skirmishing
they could have been skirmishing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't skirmish
you couldn't skirmish
he couldn't skirmish
we couldn't skirmish
you couldn't skirmish
they couldn't skirmish 	I couldn't be skirmishing
you couldn't be skirmishing
he couldn't be skirmishing
we couldn't be skirmishing
you couldn't be skirmishing
they couldn't be skirmishing	I couldn't have skirmished
you couldn't have skirmished
he couldn't have skirmished
we couldn't have skirmished
you couldn't have skirmished
they couldn't have skirmished	I couldn't have been skirmishing
you couldn't have been skirmishing
he couldn't have been skirmishing
we couldn't have been skirmishing
you couldn't have been skirmishing
they couldn't have been skirmishing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I skirmish?
could you skirmish?
could he skirmish?
could we skirmish?
could you skirmish?
could they skirmish? 	could I be skirmishing?
could you be skirmishing?
could he be skirmishing?
could we be skirmishing?
could you be skirmishing?
could they be skirmishing? 	could I have skirmished?
could you have skirmished?
could he have skirmished?
could we have skirmished?
could you have skirmished?
could they have skirmished? 	could I have been skirmishing?
could you have been skirmishing?
could he have been skirmishing?
could we have been skirmishing?
could you have been skirmishing?
could they have been skirmishing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I skirmish?
couldn't you skirmish?
couldn't he skirmish?
couldn't we skirmish?
couldn't you skirmish?
couldn't they skirmish? 	couldn't I be skirmishing?
couldn't you be skirmishing?
couldn't he be skirmishing?
couldn't we be skirmishing?
couldn't you be skirmishing?
couldn't they be skirmishing? 	couldn't I have skirmished?
couldn't you have skirmished?
couldn't he have skirmished?
couldn't we have skirmished?
couldn't you have skirmished?
couldn't they have skirmished? 	couldn't I have been skirmishing?
couldn't you have been skirmishing?
couldn't he have been skirmishing?
couldn't we have been skirmishing?
couldn't you have been skirmishing?
couldn't they have been skirmishing?