could surveil
Regular verb: surveil - surveiled- surveiled

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could surveil
you could surveil
he could surveil
we could surveil
you could surveil
they could surveil 	I could be surveiling
you could be surveiling
he could be surveiling
we could be surveiling
you could be surveiling
they could be surveiling	I could have surveiled
you could have surveiled
he could have surveiled
we could have surveiled
you could have surveiled
they could have surveiled	I could have been surveiling
you could have been surveiling
he could have been surveiling
we could have been surveiling
you could have been surveiling
they could have been surveiling	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could not surveil
you could not surveil
he could not surveil
we could not surveil
you could not surveil
they could not surveil 	I could not be surveiling
you could not be surveiling
he could not be surveiling
we could not be surveiling
you could not be surveiling
they could not be surveiling	I could not have surveiled
you could not have surveiled
he could not have surveiled
we could not have surveiled
you could not have surveiled
they could not have surveiled	I could not have been surveiling
you could not have been surveiling
he could not have been surveiling
we could not have been surveiling
you could not have been surveiling
they could not have been surveiling	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I surveil?
could you surveil?
could he surveil?
could we surveil?
could you surveil?
could they surveil? 	could I be surveiling?
could you be surveiling?
could he be surveiling?
could we be surveiling?
could you be surveiling?
could they be surveiling? 	could I have surveiled?
could you have surveiled?
could he have surveiled?
could we have surveiled?
could you have surveiled?
could they have surveiled? 	could I have been surveiling?
could you have been surveiling?
could he have been surveiling?
could we have been surveiling?
could you have been surveiling?
could they have been surveiling? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I not surveil?
could you not surveil?
could he not surveil?
could we not surveil?
could you not surveil?
could they not surveil? 	could I not be surveiling?
could you not be surveiling?
could he not be surveiling?
could we not be surveiling?
could you not be surveiling?
could they not be surveiling? 	could I not have surveiled?
could you not have surveiled?
could he not have surveiled?
could we not have surveiled?
could you not have surveiled?
could they not have surveiled? 	could I not have been surveiling?
could you not have been surveiling?
could he not have been surveiling?
could we not have been surveiling?
could you not have been surveiling?
could they not have been surveiling?