I must strike you must strike she must strike we must strike you must strike they must strike
V-ing form
I must be striking you must be striking she must be striking we must be striking you must be striking they must be striking
Perfect
I must have struck, stricken you must have struck, stricken she must have struck, stricken we must have struck, stricken you must have struck, stricken they must have struck, stricken
V-ing perfect
I must have been striking you must have been striking she must have been striking we must have been striking you must have been striking they must have been striking
Negation
Simple form
I must not strike you must not strike she must not strike we must not strike you must not strike they must not strike
V-ing form
I must not be striking you must not be striking she must not be striking we must not be striking you must not be striking they must not be striking
Perfect
I must not have struck, stricken you must not have struck, stricken she must not have struck, stricken we must not have struck, stricken you must not have struck, stricken they must not have struck, stricken
V-ing perfect
I must not have been striking you must not have been striking she must not have been striking we must not have been striking you must not have been striking they must not have been striking
Interrogative form
Simple form
must I strike? must you strike? must she strike? must we strike? must you strike? must they strike?
V-ing form
must I be striking? must you be striking? must she be striking? must we be striking? must you be striking? must they be striking?
Perfect
must I have struck, stricken? must you have struck, stricken? must she have struck, stricken? must we have struck, stricken? must you have struck, stricken? must they have struck, stricken?
V-ing perfect
must I have been striking? must you have been striking? must she have been striking? must we have been striking? must you have been striking? must they have been striking?
Interro-negative form
Simple form
must I not strike? must you not strike? must she not strike? must we not strike? must you not strike? must they not strike?
V-ing form
must I not be striking? must you not be striking? must she not be striking? must we not be striking? must you not be striking? must they not be striking?
Perfect
must I not have struck, stricken? must you not have struck, stricken? must she not have struck, stricken? must we not have struck, stricken? must you not have struck, stricken? must they not have struck, stricken?
V-ing perfect
must I not have been striking? must you not have been striking? must she not have been striking? must we not have been striking? must you not have been striking? must they not have been striking?