I must skinny-dip you must skinny-dip she must skinny-dip we must skinny-dip you must skinny-dip they must skinny-dip
V-ing form
I must be skinny-diping you must be skinny-diping she must be skinny-diping we must be skinny-diping you must be skinny-diping they must be skinny-diping
Perfect
I must have skinny-diped you must have skinny-diped she must have skinny-diped we must have skinny-diped you must have skinny-diped they must have skinny-diped
V-ing perfect
I must have been skinny-diping you must have been skinny-diping she must have been skinny-diping we must have been skinny-diping you must have been skinny-diping they must have been skinny-diping
Negation
Simple form
I mustn't skinny-dip you mustn't skinny-dip she mustn't skinny-dip we mustn't skinny-dip you mustn't skinny-dip they mustn't skinny-dip
V-ing form
I mustn't be skinny-diping you mustn't be skinny-diping she mustn't be skinny-diping we mustn't be skinny-diping you mustn't be skinny-diping they mustn't be skinny-diping
Perfect
I mustn't have skinny-diped you mustn't have skinny-diped she mustn't have skinny-diped we mustn't have skinny-diped you mustn't have skinny-diped they mustn't have skinny-diped
V-ing perfect
I mustn't have been skinny-diping you mustn't have been skinny-diping she mustn't have been skinny-diping we mustn't have been skinny-diping you mustn't have been skinny-diping they mustn't have been skinny-diping
Interrogative form
Simple form
must I skinny-dip? must you skinny-dip? must she skinny-dip? must we skinny-dip? must you skinny-dip? must they skinny-dip?
V-ing form
must I be skinny-diping? must you be skinny-diping? must she be skinny-diping? must we be skinny-diping? must you be skinny-diping? must they be skinny-diping?
Perfect
must I have skinny-diped? must you have skinny-diped? must she have skinny-diped? must we have skinny-diped? must you have skinny-diped? must they have skinny-diped?
V-ing perfect
must I have been skinny-diping? must you have been skinny-diping? must she have been skinny-diping? must we have been skinny-diping? must you have been skinny-diping? must they have been skinny-diping?
Interro-negative form
Simple form
mustn't I skinny-dip? mustn't you skinny-dip? mustn't she skinny-dip? mustn't we skinny-dip? mustn't you skinny-dip? mustn't they skinny-dip?
V-ing form
mustn't I be skinny-diping? mustn't you be skinny-diping? mustn't she be skinny-diping? mustn't we be skinny-diping? mustn't you be skinny-diping? mustn't they be skinny-diping?
Perfect
mustn't I have skinny-diped? mustn't you have skinny-diped? mustn't she have skinny-diped? mustn't we have skinny-diped? mustn't you have skinny-diped? mustn't they have skinny-diped?
V-ing perfect
mustn't I have been skinny-diping? mustn't you have been skinny-diping? mustn't she have been skinny-diping? mustn't we have been skinny-diping? mustn't you have been skinny-diping? mustn't they have been skinny-diping?