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 can't protect you can't protect he can't protect we can't protect you can't protect they can't protect	I can't be protecting you can't be protecting he can't be protecting we can't be protecting you can't be protecting they can't be protecting
Perfect	V-ing perfect
I can't have protected you can't have protected he can't have protected we can't have protected you can't have protected they can't have protected	I can't have been protecting you can't have been protecting he can't have been protecting we can't have been protecting you can't have been protecting they can't 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't I protect? can't you protect? can't he protect? can't we protect? can't you protect? can't they protect?	can't I be protecting? can't you be protecting? can't he be protecting? can't we be protecting? can't you be protecting? can't they be protecting?
Perfect	V-ing perfect
can't I have protected? can't you have protected? can't he have protected? can't we have protected? can't you have protected? can't they have protected?	can't I have been protecting? can't you have been protecting? can't he have been protecting? can't we have been protecting? can't you have been protecting? can't they have been protecting?