could abort
Regular verb: abort - aborted- aborted

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could abort
you could abort
he could abort
we could abort
you could abort
they could abort 	I could be aborting
you could be aborting
he could be aborting
we could be aborting
you could be aborting
they could be aborting	I could have aborted
you could have aborted
he could have aborted
we could have aborted
you could have aborted
they could have aborted	I could have been aborting
you could have been aborting
he could have been aborting
we could have been aborting
you could have been aborting
they could have been aborting	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't abort
you couldn't abort
he couldn't abort
we couldn't abort
you couldn't abort
they couldn't abort 	I couldn't be aborting
you couldn't be aborting
he couldn't be aborting
we couldn't be aborting
you couldn't be aborting
they couldn't be aborting	I couldn't have aborted
you couldn't have aborted
he couldn't have aborted
we couldn't have aborted
you couldn't have aborted
they couldn't have aborted	I couldn't have been aborting
you couldn't have been aborting
he couldn't have been aborting
we couldn't have been aborting
you couldn't have been aborting
they couldn't have been aborting	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I abort?
could you abort?
could he abort?
could we abort?
could you abort?
could they abort? 	could I be aborting?
could you be aborting?
could he be aborting?
could we be aborting?
could you be aborting?
could they be aborting? 	could I have aborted?
could you have aborted?
could he have aborted?
could we have aborted?
could you have aborted?
could they have aborted? 	could I have been aborting?
could you have been aborting?
could he have been aborting?
could we have been aborting?
could you have been aborting?
could they have been aborting? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I abort?
couldn't you abort?
couldn't he abort?
couldn't we abort?
couldn't you abort?
couldn't they abort? 	couldn't I be aborting?
couldn't you be aborting?
couldn't he be aborting?
couldn't we be aborting?
couldn't you be aborting?
couldn't they be aborting? 	couldn't I have aborted?
couldn't you have aborted?
couldn't he have aborted?
couldn't we have aborted?
couldn't you have aborted?
couldn't they have aborted? 	couldn't I have been aborting?
couldn't you have been aborting?
couldn't he have been aborting?
couldn't we have been aborting?
couldn't you have been aborting?
couldn't they have been aborting?