I must windsurf you must windsurf she must windsurf we must windsurf you must windsurf they must windsurf
Forma con V-ing
I must be windsurfing you must be windsurfing she must be windsurfing we must be windsurfing you must be windsurfing they must be windsurfing
Perfecto
I must have windsurfed you must have windsurfed she must have windsurfed we must have windsurfed you must have windsurfed they must have windsurfed
Perfecto con V-ing
I must have been windsurfing you must have been windsurfing she must have been windsurfing we must have been windsurfing you must have been windsurfing they must have been windsurfing
Negación
Forma simple
I must not windsurf you must not windsurf she must not windsurf we must not windsurf you must not windsurf they must not windsurf
Forma con V-ing
I must not be windsurfing you must not be windsurfing she must not be windsurfing we must not be windsurfing you must not be windsurfing they must not be windsurfing
Perfecto
I must not have windsurfed you must not have windsurfed she must not have windsurfed we must not have windsurfed you must not have windsurfed they must not have windsurfed
Perfecto con V-ing
I must not have been windsurfing you must not have been windsurfing she must not have been windsurfing we must not have been windsurfing you must not have been windsurfing they must not have been windsurfing
Forma interrogativa
Forma simple
must I windsurf? must you windsurf? must she windsurf? must we windsurf? must you windsurf? must they windsurf?
Forma con V-ing
must I be windsurfing? must you be windsurfing? must she be windsurfing? must we be windsurfing? must you be windsurfing? must they be windsurfing?
Perfecto
must I have windsurfed? must you have windsurfed? must she have windsurfed? must we have windsurfed? must you have windsurfed? must they have windsurfed?
Perfecto con V-ing
must I have been windsurfing? must you have been windsurfing? must she have been windsurfing? must we have been windsurfing? must you have been windsurfing? must they have been windsurfing?
Forma interro-negativa
Forma simple
must I not windsurf? must you not windsurf? must she not windsurf? must we not windsurf? must you not windsurf? must they not windsurf?
Forma con V-ing
must I not be windsurfing? must you not be windsurfing? must she not be windsurfing? must we not be windsurfing? must you not be windsurfing? must they not be windsurfing?
Perfecto
must I not have windsurfed? must you not have windsurfed? must she not have windsurfed? must we not have windsurfed? must you not have windsurfed? must they not have windsurfed?
Perfecto con V-ing
must I not have been windsurfing? must you not have been windsurfing? must she not have been windsurfing? must we not have been windsurfing? must you not have been windsurfing? must they not have been windsurfing?