could expert
Regular verb: expert - experted- experted

, this verb may not exist. Conjugation is given as example.

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could expert
you could expert
she could expert
we could expert
you could expert
they could expert 	I could be experting
you could be experting
she could be experting
we could be experting
you could be experting
they could be experting	I could have experted
you could have experted
she could have experted
we could have experted
you could have experted
they could have experted	I could have been experting
you could have been experting
she could have been experting
we could have been experting
you could have been experting
they could have been experting	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could not expert
you could not expert
she could not expert
we could not expert
you could not expert
they could not expert 	I could not be experting
you could not be experting
she could not be experting
we could not be experting
you could not be experting
they could not be experting	I could not have experted
you could not have experted
she could not have experted
we could not have experted
you could not have experted
they could not have experted	I could not have been experting
you could not have been experting
she could not have been experting
we could not have been experting
you could not have been experting
they could not have been experting	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I expert?
could you expert?
could she expert?
could we expert?
could you expert?
could they expert? 	could I be experting?
could you be experting?
could she be experting?
could we be experting?
could you be experting?
could they be experting? 	could I have experted?
could you have experted?
could she have experted?
could we have experted?
could you have experted?
could they have experted? 	could I have been experting?
could you have been experting?
could she have been experting?
could we have been experting?
could you have been experting?
could they have been experting? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I not expert?
could you not expert?
could she not expert?
could we not expert?
could you not expert?
could they not expert? 	could I not be experting?
could you not be experting?
could she not be experting?
could we not be experting?
could you not be experting?
could they not be experting? 	could I not have experted?
could you not have experted?
could she not have experted?
could we not have experted?
could you not have experted?
could they not have experted? 	could I not have been experting?
could you not have been experting?
could she not have been experting?
could we not have been experting?
could you not have been experting?
could they not have been experting?