
Verbe régulier : roar - roared - roared
Forme simple | Forme en V-ing | 
| I must roar you must roar she must roar we must roar you must roar they must roar  | I must be roaring you must be roaring she must be roaring we must be roaring you must be roaring they must be roaring  | 
Perfect | Perfect en V-ing | 
| I must have roared you must have roared she must have roared we must have roared you must have roared they must have roared  | I must have been roaring you must have been roaring she must have been roaring we must have been roaring you must have been roaring they must have been roaring  | 
Forme simple | Forme en V-ing | 
| I mustn't roar you mustn't roar she mustn't roar we mustn't roar you mustn't roar they mustn't roar  | I mustn't be roaring you mustn't be roaring she mustn't be roaring we mustn't be roaring you mustn't be roaring they mustn't be roaring  | 
Perfect | Perfect en V-ing | 
| I mustn't have roared you mustn't have roared she mustn't have roared we mustn't have roared you mustn't have roared they mustn't have roared  | I mustn't have been roaring you mustn't have been roaring she mustn't have been roaring we mustn't have been roaring you mustn't have been roaring they mustn't have been roaring  | 
Forme simple | Forme en V-ing | 
| must I roar? must you roar? must she roar? must we roar? must you roar? must they roar?  | must I be roaring? must you be roaring? must she be roaring? must we be roaring? must you be roaring? must they be roaring?  | 
Perfect | Perfect en V-ing | 
| must I have roared? must you have roared? must she have roared? must we have roared? must you have roared? must they have roared?  | must I have been roaring? must you have been roaring? must she have been roaring? must we have been roaring? must you have been roaring? must they have been roaring?  | 
Forme simple | Forme en V-ing | 
| mustn't I roar? mustn't you roar? mustn't she roar? mustn't we roar? mustn't you roar? mustn't they roar?  | mustn't I be roaring? mustn't you be roaring? mustn't she be roaring? mustn't we be roaring? mustn't you be roaring? mustn't they be roaring?  | 
Perfect | Perfect en V-ing | 
| mustn't I have roared? mustn't you have roared? mustn't she have roared? mustn't we have roared? mustn't you have roared? mustn't they have roared?  | mustn't I have been roaring? mustn't you have been roaring? mustn't she have been roaring? mustn't we have been roaring? mustn't you have been roaring? mustn't they have been roaring?  |