could assess
Regular verb: assess - assessed- assessed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could assess
you could assess
she could assess
we could assess
you could assess
they could assess 	I could be assessing
you could be assessing
she could be assessing
we could be assessing
you could be assessing
they could be assessing	I could have assessed
you could have assessed
she could have assessed
we could have assessed
you could have assessed
they could have assessed	I could have been assessing
you could have been assessing
she could have been assessing
we could have been assessing
you could have been assessing
they could have been assessing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could not assess
you could not assess
she could not assess
we could not assess
you could not assess
they could not assess 	I could not be assessing
you could not be assessing
she could not be assessing
we could not be assessing
you could not be assessing
they could not be assessing	I could not have assessed
you could not have assessed
she could not have assessed
we could not have assessed
you could not have assessed
they could not have assessed	I could not have been assessing
you could not have been assessing
she could not have been assessing
we could not have been assessing
you could not have been assessing
they could not have been assessing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I assess?
could you assess?
could she assess?
could we assess?
could you assess?
could they assess? 	could I be assessing?
could you be assessing?
could she be assessing?
could we be assessing?
could you be assessing?
could they be assessing? 	could I have assessed?
could you have assessed?
could she have assessed?
could we have assessed?
could you have assessed?
could they have assessed? 	could I have been assessing?
could you have been assessing?
could she have been assessing?
could we have been assessing?
could you have been assessing?
could they have been assessing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I not assess?
could you not assess?
could she not assess?
could we not assess?
could you not assess?
could they not assess? 	could I not be assessing?
could you not be assessing?
could she not be assessing?
could we not be assessing?
could you not be assessing?
could they not be assessing? 	could I not have assessed?
could you not have assessed?
could she not have assessed?
could we not have assessed?
could you not have assessed?
could they not have assessed? 	could I not have been assessing?
could you not have been assessing?
could she not have been assessing?
could we not have been assessing?
could you not have been assessing?
could they not have been assessing?