must spike
Regular verb: spike - spiked- spiked

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must spike
you must spike
he must spike
we must spike
you must spike
they must spike 	I must be spiking
you must be spiking
he must be spiking
we must be spiking
you must be spiking
they must be spiking	I must have spiked
you must have spiked
he must have spiked
we must have spiked
you must have spiked
they must have spiked	I must have been spiking
you must have been spiking
he must have been spiking
we must have been spiking
you must have been spiking
they must have been spiking	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must not spike
you must not spike
he must not spike
we must not spike
you must not spike
they must not spike 	I must not be spiking
you must not be spiking
he must not be spiking
we must not be spiking
you must not be spiking
they must not be spiking	I must not have spiked
you must not have spiked
he must not have spiked
we must not have spiked
you must not have spiked
they must not have spiked	I must not have been spiking
you must not have been spiking
he must not have been spiking
we must not have been spiking
you must not have been spiking
they must not have been spiking	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I spike?
must you spike?
must he spike?
must we spike?
must you spike?
must they spike? 	must I be spiking?
must you be spiking?
must he be spiking?
must we be spiking?
must you be spiking?
must they be spiking? 	must I have spiked?
must you have spiked?
must he have spiked?
must we have spiked?
must you have spiked?
must they have spiked? 	must I have been spiking?
must you have been spiking?
must he have been spiking?
must we have been spiking?
must you have been spiking?
must they have been spiking? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I not spike?
must you not spike?
must he not spike?
must we not spike?
must you not spike?
must they not spike? 	must I not be spiking?
must you not be spiking?
must he not be spiking?
must we not be spiking?
must you not be spiking?
must they not be spiking? 	must I not have spiked?
must you not have spiked?
must he not have spiked?
must we not have spiked?
must you not have spiked?
must they not have spiked? 	must I not have been spiking?
must you not have been spiking?
must he not have been spiking?
must we not have been spiking?
must you not have been spiking?
must they not have been spiking?