I must lay you must lay he must lay we must lay you must lay they must lay
Forma con V-ing
I must be laying you must be laying he must be laying we must be laying you must be laying they must be laying
Perfecto
I must have laid you must have laid he must have laid we must have laid you must have laid they must have laid
Perfecto con V-ing
I must have been laying you must have been laying he must have been laying we must have been laying you must have been laying they must have been laying
Negación
Forma simple
I mustn't lay you mustn't lay he mustn't lay we mustn't lay you mustn't lay they mustn't lay
Forma con V-ing
I mustn't be laying you mustn't be laying he mustn't be laying we mustn't be laying you mustn't be laying they mustn't be laying
Perfecto
I mustn't have laid you mustn't have laid he mustn't have laid we mustn't have laid you mustn't have laid they mustn't have laid
Perfecto con V-ing
I mustn't have been laying you mustn't have been laying he mustn't have been laying we mustn't have been laying you mustn't have been laying they mustn't have been laying
Forma interrogativa
Forma simple
must I lay? must you lay? must he lay? must we lay? must you lay? must they lay?
Forma con V-ing
must I be laying? must you be laying? must he be laying? must we be laying? must you be laying? must they be laying?
Perfecto
must I have laid? must you have laid? must he have laid? must we have laid? must you have laid? must they have laid?
Perfecto con V-ing
must I have been laying? must you have been laying? must he have been laying? must we have been laying? must you have been laying? must they have been laying?
Forma interro-negativa
Forma simple
mustn't I lay? mustn't you lay? mustn't he lay? mustn't we lay? mustn't you lay? mustn't they lay?
Forma con V-ing
mustn't I be laying? mustn't you be laying? mustn't he be laying? mustn't we be laying? mustn't you be laying? mustn't they be laying?
Perfecto
mustn't I have laid? mustn't you have laid? mustn't he have laid? mustn't we have laid? mustn't you have laid? mustn't they have laid?
Perfecto con V-ing
mustn't I have been laying? mustn't you have been laying? mustn't he have been laying? mustn't we have been laying? mustn't you have been laying? mustn't they have been laying?