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 can't fear you can't fear he can't fear we can't fear you can't fear they can't fear	I can't be fearing you can't be fearing he can't be fearing we can't be fearing you can't be fearing they can't be fearing
Perfect	V-ing perfect
I can't have feared you can't have feared he can't have feared we can't have feared you can't have feared they can't have feared	I can't have been fearing you can't have been fearing he can't have been fearing we can't have been fearing you can't have been fearing they can't 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't I fear? can't you fear? can't he fear? can't we fear? can't you fear? can't they fear?	can't I be fearing? can't you be fearing? can't he be fearing? can't we be fearing? can't you be fearing? can't they be fearing?
Perfect	V-ing perfect
can't I have feared? can't you have feared? can't he have feared? can't we have feared? can't you have feared? can't they have feared?	can't I have been fearing? can't you have been fearing? can't he have been fearing? can't we have been fearing? can't you have been fearing? can't they have been fearing?