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