English verb conjugation
CAN BUCK

Regular verb: buck - bucked - bucked

Affirmation

Simple form	V-ing form
I can buck you can buck she can buck we can buck you can buck they can buck	I can be bucking you can be bucking she can be bucking we can be bucking you can be bucking they can be bucking
Perfect	V-ing perfect
I can have bucked you can have bucked she can have bucked we can have bucked you can have bucked they can have bucked	I can have been bucking you can have been bucking she can have been bucking we can have been bucking you can have been bucking they can have been bucking

Negation

Simple form	V-ing form
I can't buck you can't buck she can't buck we can't buck you can't buck they can't buck	I can't be bucking you can't be bucking she can't be bucking we can't be bucking you can't be bucking they can't be bucking
Perfect	V-ing perfect
I can't have bucked you can't have bucked she can't have bucked we can't have bucked you can't have bucked they can't have bucked	I can't have been bucking you can't have been bucking she can't have been bucking we can't have been bucking you can't have been bucking they can't have been bucking

Interrogative form

Simple form	V-ing form
can I buck? can you buck? can she buck? can we buck? can you buck? can they buck?	can I be bucking? can you be bucking? can she be bucking? can we be bucking? can you be bucking? can they be bucking?
Perfect	V-ing perfect
can I have bucked? can you have bucked? can she have bucked? can we have bucked? can you have bucked? can they have bucked?	can I have been bucking? can you have been bucking? can she have been bucking? can we have been bucking? can you have been bucking? can they have been bucking?

Interro-negative form

Simple form	V-ing form
can't I buck? can't you buck? can't she buck? can't we buck? can't you buck? can't they buck?	can't I be bucking? can't you be bucking? can't she be bucking? can't we be bucking? can't you be bucking? can't they be bucking?
Perfect	V-ing perfect
can't I have bucked? can't you have bucked? can't she have bucked? can't we have bucked? can't you have bucked? can't they have bucked?	can't I have been bucking? can't you have been bucking? can't she have been bucking? can't we have been bucking? can't you have been bucking? can't they have been bucking?