can foul
Regular verb: foul - fouled- fouled

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can foul
you can foul
she can foul
we can foul
you can foul
they can foul 	I can be fouling
you can be fouling
she can be fouling
we can be fouling
you can be fouling
they can be fouling	I can have fouled
you can have fouled
she can have fouled
we can have fouled
you can have fouled
they can have fouled	I can have been fouling
you can have been fouling
she can have been fouling
we can have been fouling
you can have been fouling
they can have been fouling	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I cannot foul
you cannot foul
she cannot foul
we cannot foul
you cannot foul
they cannot foul 	I cannot be fouling
you cannot be fouling
she cannot be fouling
we cannot be fouling
you cannot be fouling
they cannot be fouling	I cannot have fouled
you cannot have fouled
she cannot have fouled
we cannot have fouled
you cannot have fouled
they cannot have fouled	I cannot have been fouling
you cannot have been fouling
she cannot have been fouling
we cannot have been fouling
you cannot have been fouling
they cannot have been fouling	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I foul?
can you foul?
can she foul?
can we foul?
can you foul?
can they foul? 	can I be fouling?
can you be fouling?
can she be fouling?
can we be fouling?
can you be fouling?
can they be fouling? 	can I have fouled?
can you have fouled?
can she have fouled?
can we have fouled?
can you have fouled?
can they have fouled? 	can I have been fouling?
can you have been fouling?
can she have been fouling?
can we have been fouling?
can you have been fouling?
can they have been fouling? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I not foul?
can you not foul?
can she not foul?
can we not foul?
can you not foul?
can they not foul? 	can I not be fouling?
can you not be fouling?
can she not be fouling?
can we not be fouling?
can you not be fouling?
can they not be fouling? 	can I not have fouled?
can you not have fouled?
can she not have fouled?
can we not have fouled?
can you not have fouled?
can they not have fouled? 	can I not have been fouling?
can you not have been fouling?
can she not have been fouling?
can we not have been fouling?
can you not have been fouling?
can they not have been fouling?