can harness
Regular verb: harness - harnessed- harnessed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can harness
you can harness
she can harness
we can harness
you can harness
they can harness 	I can be harnessing
you can be harnessing
she can be harnessing
we can be harnessing
you can be harnessing
they can be harnessing	I can have harnessed
you can have harnessed
she can have harnessed
we can have harnessed
you can have harnessed
they can have harnessed	I can have been harnessing
you can have been harnessing
she can have been harnessing
we can have been harnessing
you can have been harnessing
they can have been harnessing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I cannot harness
you cannot harness
she cannot harness
we cannot harness
you cannot harness
they cannot harness 	I cannot be harnessing
you cannot be harnessing
she cannot be harnessing
we cannot be harnessing
you cannot be harnessing
they cannot be harnessing	I cannot have harnessed
you cannot have harnessed
she cannot have harnessed
we cannot have harnessed
you cannot have harnessed
they cannot have harnessed	I cannot have been harnessing
you cannot have been harnessing
she cannot have been harnessing
we cannot have been harnessing
you cannot have been harnessing
they cannot have been harnessing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I harness?
can you harness?
can she harness?
can we harness?
can you harness?
can they harness? 	can I be harnessing?
can you be harnessing?
can she be harnessing?
can we be harnessing?
can you be harnessing?
can they be harnessing? 	can I have harnessed?
can you have harnessed?
can she have harnessed?
can we have harnessed?
can you have harnessed?
can they have harnessed? 	can I have been harnessing?
can you have been harnessing?
can she have been harnessing?
can we have been harnessing?
can you have been harnessing?
can they have been harnessing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I not harness?
can you not harness?
can she not harness?
can we not harness?
can you not harness?
can they not harness? 	can I not be harnessing?
can you not be harnessing?
can she not be harnessing?
can we not be harnessing?
can you not be harnessing?
can they not be harnessing? 	can I not have harnessed?
can you not have harnessed?
can she not have harnessed?
can we not have harnessed?
can you not have harnessed?
can they not have harnessed? 	can I not have been harnessing?
can you not have been harnessing?
can she not have been harnessing?
can we not have been harnessing?
can you not have been harnessing?
can they not have been harnessing?