could dot
Regular verb: dot - dotted- dotted

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could dot
you could dot
he could dot
we could dot
you could dot
they could dot 	I could be dotting
you could be dotting
he could be dotting
we could be dotting
you could be dotting
they could be dotting	I could have dotted
you could have dotted
he could have dotted
we could have dotted
you could have dotted
they could have dotted	I could have been dotting
you could have been dotting
he could have been dotting
we could have been dotting
you could have been dotting
they could have been dotting	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could not dot
you could not dot
he could not dot
we could not dot
you could not dot
they could not dot 	I could not be dotting
you could not be dotting
he could not be dotting
we could not be dotting
you could not be dotting
they could not be dotting	I could not have dotted
you could not have dotted
he could not have dotted
we could not have dotted
you could not have dotted
they could not have dotted	I could not have been dotting
you could not have been dotting
he could not have been dotting
we could not have been dotting
you could not have been dotting
they could not have been dotting	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I dot?
could you dot?
could he dot?
could we dot?
could you dot?
could they dot? 	could I be dotting?
could you be dotting?
could he be dotting?
could we be dotting?
could you be dotting?
could they be dotting? 	could I have dotted?
could you have dotted?
could he have dotted?
could we have dotted?
could you have dotted?
could they have dotted? 	could I have been dotting?
could you have been dotting?
could he have been dotting?
could we have been dotting?
could you have been dotting?
could they have been dotting? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I not dot?
could you not dot?
could he not dot?
could we not dot?
could you not dot?
could they not dot? 	could I not be dotting?
could you not be dotting?
could he not be dotting?
could we not be dotting?
could you not be dotting?
could they not be dotting? 	could I not have dotted?
could you not have dotted?
could he not have dotted?
could we not have dotted?
could you not have dotted?
could they not have dotted? 	could I not have been dotting?
could you not have been dotting?
could he not have been dotting?
could we not have been dotting?
could you not have been dotting?
could they not have been dotting?