I must scuttle you must scuttle she must scuttle we must scuttle you must scuttle they must scuttle
V-ing form
I must be scuttling you must be scuttling she must be scuttling we must be scuttling you must be scuttling they must be scuttling
Perfect
I must have scuttled you must have scuttled she must have scuttled we must have scuttled you must have scuttled they must have scuttled
V-ing perfect
I must have been scuttling you must have been scuttling she must have been scuttling we must have been scuttling you must have been scuttling they must have been scuttling
Negation
Simple form
I must not scuttle you must not scuttle she must not scuttle we must not scuttle you must not scuttle they must not scuttle
V-ing form
I must not be scuttling you must not be scuttling she must not be scuttling we must not be scuttling you must not be scuttling they must not be scuttling
Perfect
I must not have scuttled you must not have scuttled she must not have scuttled we must not have scuttled you must not have scuttled they must not have scuttled
V-ing perfect
I must not have been scuttling you must not have been scuttling she must not have been scuttling we must not have been scuttling you must not have been scuttling they must not have been scuttling
Interrogative form
Simple form
must I scuttle? must you scuttle? must she scuttle? must we scuttle? must you scuttle? must they scuttle?
V-ing form
must I be scuttling? must you be scuttling? must she be scuttling? must we be scuttling? must you be scuttling? must they be scuttling?
Perfect
must I have scuttled? must you have scuttled? must she have scuttled? must we have scuttled? must you have scuttled? must they have scuttled?
V-ing perfect
must I have been scuttling? must you have been scuttling? must she have been scuttling? must we have been scuttling? must you have been scuttling? must they have been scuttling?
Interro-negative form
Simple form
must I not scuttle? must you not scuttle? must she not scuttle? must we not scuttle? must you not scuttle? must they not scuttle?
V-ing form
must I not be scuttling? must you not be scuttling? must she not be scuttling? must we not be scuttling? must you not be scuttling? must they not be scuttling?
Perfect
must I not have scuttled? must you not have scuttled? must she not have scuttled? must we not have scuttled? must you not have scuttled? must they not have scuttled?
V-ing perfect
must I not have been scuttling? must you not have been scuttling? must she not have been scuttling? must we not have been scuttling? must you not have been scuttling? must they not have been scuttling?