English verb conjugation
CAN COMPLETE

Regular verb: complete - completed - completed

Affirmation

Simple form	V-ing form
I can complete you can complete he can complete we can complete you can complete they can complete	I can be completing you can be completing he can be completing we can be completing you can be completing they can be completing
Perfect	V-ing perfect
I can have completed you can have completed he can have completed we can have completed you can have completed they can have completed	I can have been completing you can have been completing he can have been completing we can have been completing you can have been completing they can have been completing

Negation

Simple form	V-ing form
I can't complete you can't complete he can't complete we can't complete you can't complete they can't complete	I can't be completing you can't be completing he can't be completing we can't be completing you can't be completing they can't be completing
Perfect	V-ing perfect
I can't have completed you can't have completed he can't have completed we can't have completed you can't have completed they can't have completed	I can't have been completing you can't have been completing he can't have been completing we can't have been completing you can't have been completing they can't have been completing

Interrogative form

Simple form	V-ing form
can I complete? can you complete? can he complete? can we complete? can you complete? can they complete?	can I be completing? can you be completing? can he be completing? can we be completing? can you be completing? can they be completing?
Perfect	V-ing perfect
can I have completed? can you have completed? can he have completed? can we have completed? can you have completed? can they have completed?	can I have been completing? can you have been completing? can he have been completing? can we have been completing? can you have been completing? can they have been completing?

Interro-negative form

Simple form	V-ing form
can't I complete? can't you complete? can't he complete? can't we complete? can't you complete? can't they complete?	can't I be completing? can't you be completing? can't he be completing? can't we be completing? can't you be completing? can't they be completing?
Perfect	V-ing perfect
can't I have completed? can't you have completed? can't he have completed? can't we have completed? can't you have completed? can't they have completed?	can't I have been completing? can't you have been completing? can't he have been completing? can't we have been completing? can't you have been completing? can't they have been completing?