I must collect you must collect he must collect we must collect you must collect they must collect
Forma com V-ing
I must be collecting you must be collecting he must be collecting we must be collecting you must be collecting they must be collecting
Perfeito
I must have collected you must have collected he must have collected we must have collected you must have collected they must have collected
Perfeito com V-ing
I must have been collecting you must have been collecting he must have been collecting we must have been collecting you must have been collecting they must have been collecting
Negação
Forma simple
I mustn't collect you mustn't collect he mustn't collect we mustn't collect you mustn't collect they mustn't collect
Forma com V-ing
I mustn't be collecting you mustn't be collecting he mustn't be collecting we mustn't be collecting you mustn't be collecting they mustn't be collecting
Perfeito
I mustn't have collected you mustn't have collected he mustn't have collected we mustn't have collected you mustn't have collected they mustn't have collected
Perfeito com V-ing
I mustn't have been collecting you mustn't have been collecting he mustn't have been collecting we mustn't have been collecting you mustn't have been collecting they mustn't have been collecting
Forma interrogativa
Forma simple
must I collect? must you collect? must he collect? must we collect? must you collect? must they collect?
Forma com V-ing
must I be collecting? must you be collecting? must he be collecting? must we be collecting? must you be collecting? must they be collecting?
Perfeito
must I have collected? must you have collected? must he have collected? must we have collected? must you have collected? must they have collected?
Perfeito com V-ing
must I have been collecting? must you have been collecting? must he have been collecting? must we have been collecting? must you have been collecting? must they have been collecting?
Forma interro-Negação
Forma simple
mustn't I collect? mustn't you collect? mustn't he collect? mustn't we collect? mustn't you collect? mustn't they collect?
Forma com V-ing
mustn't I be collecting? mustn't you be collecting? mustn't he be collecting? mustn't we be collecting? mustn't you be collecting? mustn't they be collecting?
Perfeito
mustn't I have collected? mustn't you have collected? mustn't he have collected? mustn't we have collected? mustn't you have collected? mustn't they have collected?
Perfeito com V-ing
mustn't I have been collecting? mustn't you have been collecting? mustn't he have been collecting? mustn't we have been collecting? mustn't you have been collecting? mustn't they have been collecting?