must darkle
Regular verb: darkle - darkled- darkled

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must darkle
you must darkle
he must darkle
we must darkle
you must darkle
they must darkle 	I must be darkling
you must be darkling
he must be darkling
we must be darkling
you must be darkling
they must be darkling	I must have darkled
you must have darkled
he must have darkled
we must have darkled
you must have darkled
they must have darkled	I must have been darkling
you must have been darkling
he must have been darkling
we must have been darkling
you must have been darkling
they must have been darkling	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must not darkle
you must not darkle
he must not darkle
we must not darkle
you must not darkle
they must not darkle 	I must not be darkling
you must not be darkling
he must not be darkling
we must not be darkling
you must not be darkling
they must not be darkling	I must not have darkled
you must not have darkled
he must not have darkled
we must not have darkled
you must not have darkled
they must not have darkled	I must not have been darkling
you must not have been darkling
he must not have been darkling
we must not have been darkling
you must not have been darkling
they must not have been darkling	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I darkle?
must you darkle?
must he darkle?
must we darkle?
must you darkle?
must they darkle? 	must I be darkling?
must you be darkling?
must he be darkling?
must we be darkling?
must you be darkling?
must they be darkling? 	must I have darkled?
must you have darkled?
must he have darkled?
must we have darkled?
must you have darkled?
must they have darkled? 	must I have been darkling?
must you have been darkling?
must he have been darkling?
must we have been darkling?
must you have been darkling?
must they have been darkling? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I not darkle?
must you not darkle?
must he not darkle?
must we not darkle?
must you not darkle?
must they not darkle? 	must I not be darkling?
must you not be darkling?
must he not be darkling?
must we not be darkling?
must you not be darkling?
must they not be darkling? 	must I not have darkled?
must you not have darkled?
must he not have darkled?
must we not have darkled?
must you not have darkled?
must they not have darkled? 	must I not have been darkling?
must you not have been darkling?
must he not have been darkling?
must we not have been darkling?
must you not have been darkling?
must they not have been darkling?