English verb conjugation
CAN PROTECT

Regular verb: protect - protected - protected

Affirmation

Simple form	V-ing form
I can protect you can protect he can protect we can protect you can protect they can protect	I can be protecting you can be protecting he can be protecting we can be protecting you can be protecting they can be protecting
Perfect	V-ing perfect
I can have protected you can have protected he can have protected we can have protected you can have protected they can have protected	I can have been protecting you can have been protecting he can have been protecting we can have been protecting you can have been protecting they can have been protecting

Negation

Simple form	V-ing form
I cannot protect you cannot protect he cannot protect we cannot protect you cannot protect they cannot protect	I cannot be protecting you cannot be protecting he cannot be protecting we cannot be protecting you cannot be protecting they cannot be protecting
Perfect	V-ing perfect
I cannot have protected you cannot have protected he cannot have protected we cannot have protected you cannot have protected they cannot have protected	I cannot have been protecting you cannot have been protecting he cannot have been protecting we cannot have been protecting you cannot have been protecting they cannot have been protecting

Interrogative form

Simple form	V-ing form
can I protect? can you protect? can he protect? can we protect? can you protect? can they protect?	can I be protecting? can you be protecting? can he be protecting? can we be protecting? can you be protecting? can they be protecting?
Perfect	V-ing perfect
can I have protected? can you have protected? can he have protected? can we have protected? can you have protected? can they have protected?	can I have been protecting? can you have been protecting? can he have been protecting? can we have been protecting? can you have been protecting? can they have been protecting?

Interro-negative form

Simple form	V-ing form
can I not protect? can you not protect? can he not protect? can we not protect? can you not protect? can they not protect?	can I not be protecting? can you not be protecting? can he not be protecting? can we not be protecting? can you not be protecting? can they not be protecting?
Perfect	V-ing perfect
can I not have protected? can you not have protected? can he not have protected? can we not have protected? can you not have protected? can they not have protected?	can I not have been protecting? can you not have been protecting? can he not have been protecting? can we not have been protecting? can you not have been protecting? can they not have been protecting?