English verb conjugation
CAN FEAR

Regular verb: fear - feared - feared

Affirmation

Simple form	V-ing form
I can fear you can fear he can fear we can fear you can fear they can fear	I can be fearing you can be fearing he can be fearing we can be fearing you can be fearing they can be fearing
Perfect	V-ing perfect
I can have feared you can have feared he can have feared we can have feared you can have feared they can have feared	I can have been fearing you can have been fearing he can have been fearing we can have been fearing you can have been fearing they can have been fearing

Negation

Simple form	V-ing form
I cannot fear you cannot fear he cannot fear we cannot fear you cannot fear they cannot fear	I cannot be fearing you cannot be fearing he cannot be fearing we cannot be fearing you cannot be fearing they cannot be fearing
Perfect	V-ing perfect
I cannot have feared you cannot have feared he cannot have feared we cannot have feared you cannot have feared they cannot have feared	I cannot have been fearing you cannot have been fearing he cannot have been fearing we cannot have been fearing you cannot have been fearing they cannot have been fearing

Interrogative form

Simple form	V-ing form
can I fear? can you fear? can he fear? can we fear? can you fear? can they fear?	can I be fearing? can you be fearing? can he be fearing? can we be fearing? can you be fearing? can they be fearing?
Perfect	V-ing perfect
can I have feared? can you have feared? can he have feared? can we have feared? can you have feared? can they have feared?	can I have been fearing? can you have been fearing? can he have been fearing? can we have been fearing? can you have been fearing? can they have been fearing?

Interro-negative form

Simple form	V-ing form
can I not fear? can you not fear? can he not fear? can we not fear? can you not fear? can they not fear?	can I not be fearing? can you not be fearing? can he not be fearing? can we not be fearing? can you not be fearing? can they not be fearing?
Perfect	V-ing perfect
can I not have feared? can you not have feared? can he not have feared? can we not have feared? can you not have feared? can they not have feared?	can I not have been fearing? can you not have been fearing? can he not have been fearing? can we not have been fearing? can you not have been fearing? can they not have been fearing?