
Verbo regular: bow - bowed - bowed
Forma simple | Forma con V-ing | 
| I must bow you must bow she must bow we must bow you must bow they must bow  | I must be bowing you must be bowing she must be bowing we must be bowing you must be bowing they must be bowing  | 
Perfecto | Perfecto con V-ing | 
| I must have bowed you must have bowed she must have bowed we must have bowed you must have bowed they must have bowed  | I must have been bowing you must have been bowing she must have been bowing we must have been bowing you must have been bowing they must have been bowing  | 
Forma simple | Forma con V-ing | 
| I mustn't bow you mustn't bow she mustn't bow we mustn't bow you mustn't bow they mustn't bow  | I mustn't be bowing you mustn't be bowing she mustn't be bowing we mustn't be bowing you mustn't be bowing they mustn't be bowing  | 
Perfecto | Perfecto con V-ing | 
| I mustn't have bowed you mustn't have bowed she mustn't have bowed we mustn't have bowed you mustn't have bowed they mustn't have bowed  | I mustn't have been bowing you mustn't have been bowing she mustn't have been bowing we mustn't have been bowing you mustn't have been bowing they mustn't have been bowing  | 
Forma simple | Forma con V-ing | 
| must I bow? must you bow? must she bow? must we bow? must you bow? must they bow?  | must I be bowing? must you be bowing? must she be bowing? must we be bowing? must you be bowing? must they be bowing?  | 
Perfecto | Perfecto con V-ing | 
| must I have bowed? must you have bowed? must she have bowed? must we have bowed? must you have bowed? must they have bowed?  | must I have been bowing? must you have been bowing? must she have been bowing? must we have been bowing? must you have been bowing? must they have been bowing?  | 
Forma simple | Forma con V-ing | 
| mustn't I bow? mustn't you bow? mustn't she bow? mustn't we bow? mustn't you bow? mustn't they bow?  | mustn't I be bowing? mustn't you be bowing? mustn't she be bowing? mustn't we be bowing? mustn't you be bowing? mustn't they be bowing?  | 
Perfecto | Perfecto con V-ing | 
| mustn't I have bowed? mustn't you have bowed? mustn't she have bowed? mustn't we have bowed? mustn't you have bowed? mustn't they have bowed?  | mustn't I have been bowing? mustn't you have been bowing? mustn't she have been bowing? mustn't we have been bowing? mustn't you have been bowing? mustn't they have been bowing?  |