English verb conjugation
CAN DESIGN

Regular verb: design - designed - designed

Affirmation

Simple form	V-ing form
I can design you can design she can design we can design you can design they can design	I can be designing you can be designing she can be designing we can be designing you can be designing they can be designing
Perfect	V-ing perfect
I can have designed you can have designed she can have designed we can have designed you can have designed they can have designed	I can have been designing you can have been designing she can have been designing we can have been designing you can have been designing they can have been designing

Negation

Simple form	V-ing form
I can't design you can't design she can't design we can't design you can't design they can't design	I can't be designing you can't be designing she can't be designing we can't be designing you can't be designing they can't be designing
Perfect	V-ing perfect
I can't have designed you can't have designed she can't have designed we can't have designed you can't have designed they can't have designed	I can't have been designing you can't have been designing she can't have been designing we can't have been designing you can't have been designing they can't have been designing

Interrogative form

Simple form	V-ing form
can I design? can you design? can she design? can we design? can you design? can they design?	can I be designing? can you be designing? can she be designing? can we be designing? can you be designing? can they be designing?
Perfect	V-ing perfect
can I have designed? can you have designed? can she have designed? can we have designed? can you have designed? can they have designed?	can I have been designing? can you have been designing? can she have been designing? can we have been designing? can you have been designing? can they have been designing?

Interro-negative form

Simple form	V-ing form
can't I design? can't you design? can't she design? can't we design? can't you design? can't they design?	can't I be designing? can't you be designing? can't she be designing? can't we be designing? can't you be designing? can't they be designing?
Perfect	V-ing perfect
can't I have designed? can't you have designed? can't she have designed? can't we have designed? can't you have designed? can't they have designed?	can't I have been designing? can't you have been designing? can't she have been designing? can't we have been designing? can't you have been designing? can't they have been designing?