I must strengthen you must strengthen he must strengthen we must strengthen you must strengthen they must strengthen
Form mit V-ing
I must be strengthening you must be strengthening he must be strengthening we must be strengthening you must be strengthening they must be strengthening
Perfekt
I must have strengthened you must have strengthened he must have strengthened we must have strengthened you must have strengthened they must have strengthened
Perfekt mit V-ing
I must have been strengthening you must have been strengthening he must have been strengthening we must have been strengthening you must have been strengthening they must have been strengthening
Negation
Einfache Form
I mustn't strengthen you mustn't strengthen he mustn't strengthen we mustn't strengthen you mustn't strengthen they mustn't strengthen
Form mit V-ing
I mustn't be strengthening you mustn't be strengthening he mustn't be strengthening we mustn't be strengthening you mustn't be strengthening they mustn't be strengthening
Perfekt
I mustn't have strengthened you mustn't have strengthened he mustn't have strengthened we mustn't have strengthened you mustn't have strengthened they mustn't have strengthened
Perfekt mit V-ing
I mustn't have been strengthening you mustn't have been strengthening he mustn't have been strengthening we mustn't have been strengthening you mustn't have been strengthening they mustn't have been strengthening
Fragende Form
Einfache Form
must I strengthen? must you strengthen? must he strengthen? must we strengthen? must you strengthen? must they strengthen?
Form mit V-ing
must I be strengthening? must you be strengthening? must he be strengthening? must we be strengthening? must you be strengthening? must they be strengthening?
Perfekt
must I have strengthened? must you have strengthened? must he have strengthened? must we have strengthened? must you have strengthened? must they have strengthened?
Perfekt mit V-ing
must I have been strengthening? must you have been strengthening? must he have been strengthening? must we have been strengthening? must you have been strengthening? must they have been strengthening?
Fragende Negation Form
Einfache Form
mustn't I strengthen? mustn't you strengthen? mustn't he strengthen? mustn't we strengthen? mustn't you strengthen? mustn't they strengthen?
Form mit V-ing
mustn't I be strengthening? mustn't you be strengthening? mustn't he be strengthening? mustn't we be strengthening? mustn't you be strengthening? mustn't they be strengthening?
Perfekt
mustn't I have strengthened? mustn't you have strengthened? mustn't he have strengthened? mustn't we have strengthened? mustn't you have strengthened? mustn't they have strengthened?
Perfekt mit V-ing
mustn't I have been strengthening? mustn't you have been strengthening? mustn't he have been strengthening? mustn't we have been strengthening? mustn't you have been strengthening? mustn't they have been strengthening?