I must purse-seine you must purse-seine he must purse-seine we must purse-seine you must purse-seine they must purse-seine
V-ing form
I must be purse-seining you must be purse-seining he must be purse-seining we must be purse-seining you must be purse-seining they must be purse-seining
Perfect
I must have purse-seined you must have purse-seined he must have purse-seined we must have purse-seined you must have purse-seined they must have purse-seined
V-ing perfect
I must have been purse-seining you must have been purse-seining he must have been purse-seining we must have been purse-seining you must have been purse-seining they must have been purse-seining
Negation
Simple form
I mustn't purse-seine you mustn't purse-seine he mustn't purse-seine we mustn't purse-seine you mustn't purse-seine they mustn't purse-seine
V-ing form
I mustn't be purse-seining you mustn't be purse-seining he mustn't be purse-seining we mustn't be purse-seining you mustn't be purse-seining they mustn't be purse-seining
Perfect
I mustn't have purse-seined you mustn't have purse-seined he mustn't have purse-seined we mustn't have purse-seined you mustn't have purse-seined they mustn't have purse-seined
V-ing perfect
I mustn't have been purse-seining you mustn't have been purse-seining he mustn't have been purse-seining we mustn't have been purse-seining you mustn't have been purse-seining they mustn't have been purse-seining
Interrogative form
Simple form
must I purse-seine? must you purse-seine? must he purse-seine? must we purse-seine? must you purse-seine? must they purse-seine?
V-ing form
must I be purse-seining? must you be purse-seining? must he be purse-seining? must we be purse-seining? must you be purse-seining? must they be purse-seining?
Perfect
must I have purse-seined? must you have purse-seined? must he have purse-seined? must we have purse-seined? must you have purse-seined? must they have purse-seined?
V-ing perfect
must I have been purse-seining? must you have been purse-seining? must he have been purse-seining? must we have been purse-seining? must you have been purse-seining? must they have been purse-seining?
Interro-negative form
Simple form
mustn't I purse-seine? mustn't you purse-seine? mustn't he purse-seine? mustn't we purse-seine? mustn't you purse-seine? mustn't they purse-seine?
V-ing form
mustn't I be purse-seining? mustn't you be purse-seining? mustn't he be purse-seining? mustn't we be purse-seining? mustn't you be purse-seining? mustn't they be purse-seining?
Perfect
mustn't I have purse-seined? mustn't you have purse-seined? mustn't he have purse-seined? mustn't we have purse-seined? mustn't you have purse-seined? mustn't they have purse-seined?
V-ing perfect
mustn't I have been purse-seining? mustn't you have been purse-seining? mustn't he have been purse-seining? mustn't we have been purse-seining? mustn't you have been purse-seining? mustn't they have been purse-seining?