I must roast you must roast she must roast we must roast you must roast they must roast
V-ing form
I must be roasting you must be roasting she must be roasting we must be roasting you must be roasting they must be roasting
Perfect
I must have roasted you must have roasted she must have roasted we must have roasted you must have roasted they must have roasted
V-ing perfect
I must have been roasting you must have been roasting she must have been roasting we must have been roasting you must have been roasting they must have been roasting
Negation
Simple form
I must not roast you must not roast she must not roast we must not roast you must not roast they must not roast
V-ing form
I must not be roasting you must not be roasting she must not be roasting we must not be roasting you must not be roasting they must not be roasting
Perfect
I must not have roasted you must not have roasted she must not have roasted we must not have roasted you must not have roasted they must not have roasted
V-ing perfect
I must not have been roasting you must not have been roasting she must not have been roasting we must not have been roasting you must not have been roasting they must not have been roasting
Interrogative form
Simple form
must I roast? must you roast? must she roast? must we roast? must you roast? must they roast?
V-ing form
must I be roasting? must you be roasting? must she be roasting? must we be roasting? must you be roasting? must they be roasting?
Perfect
must I have roasted? must you have roasted? must she have roasted? must we have roasted? must you have roasted? must they have roasted?
V-ing perfect
must I have been roasting? must you have been roasting? must she have been roasting? must we have been roasting? must you have been roasting? must they have been roasting?
Interro-negative form
Simple form
must I not roast? must you not roast? must she not roast? must we not roast? must you not roast? must they not roast?
V-ing form
must I not be roasting? must you not be roasting? must she not be roasting? must we not be roasting? must you not be roasting? must they not be roasting?
Perfect
must I not have roasted? must you not have roasted? must she not have roasted? must we not have roasted? must you not have roasted? must they not have roasted?
V-ing perfect
must I not have been roasting? must you not have been roasting? must she not have been roasting? must we not have been roasting? must you not have been roasting? must they not have been roasting?