
Verbe régulier : warn -  warned - warned
Traduction française : avertir - conseiller 
Forme simple | Forme en V-ing | 
| I must warn you must warn she must warn we must warn you must warn they must warn  | I must be warning you must be warning she must be warning we must be warning you must be warning they must be warning  | 
Perfect | Perfect en V-ing | 
| I must have warned you must have warned she must have warned we must have warned you must have warned they must have warned  | I must have been warning you must have been warning she must have been warning we must have been warning you must have been warning they must have been warning  | 
Forme simple | Forme en V-ing | 
| I mustn't warn you mustn't warn she mustn't warn we mustn't warn you mustn't warn they mustn't warn  | I mustn't be warning you mustn't be warning she mustn't be warning we mustn't be warning you mustn't be warning they mustn't be warning  | 
Perfect | Perfect en V-ing | 
| I mustn't have warned you mustn't have warned she mustn't have warned we mustn't have warned you mustn't have warned they mustn't have warned  | I mustn't have been warning you mustn't have been warning she mustn't have been warning we mustn't have been warning you mustn't have been warning they mustn't have been warning  | 
Forme simple | Forme en V-ing | 
| must I warn? must you warn? must she warn? must we warn? must you warn? must they warn?  | must I be warning? must you be warning? must she be warning? must we be warning? must you be warning? must they be warning?  | 
Perfect | Perfect en V-ing | 
| must I have warned? must you have warned? must she have warned? must we have warned? must you have warned? must they have warned?  | must I have been warning? must you have been warning? must she have been warning? must we have been warning? must you have been warning? must they have been warning?  | 
Forme simple | Forme en V-ing | 
| mustn't I warn? mustn't you warn? mustn't she warn? mustn't we warn? mustn't you warn? mustn't they warn?  | mustn't I be warning? mustn't you be warning? mustn't she be warning? mustn't we be warning? mustn't you be warning? mustn't they be warning?  | 
Perfect | Perfect en V-ing | 
| mustn't I have warned? mustn't you have warned? mustn't she have warned? mustn't we have warned? mustn't you have warned? mustn't they have warned?  | mustn't I have been warning? mustn't you have been warning? mustn't she have been warning? mustn't we have been warning? mustn't you have been warning? mustn't they have been warning?  |