
Regular verb: encounter - encountered - encountered
Simple form | V-ing form | 
| I must encounter you must encounter she must encounter we must encounter you must encounter they must encounter  | I must be encountering you must be encountering she must be encountering we must be encountering you must be encountering they must be encountering  | 
Perfect | V-ing perfect | 
| I must have encountered you must have encountered she must have encountered we must have encountered you must have encountered they must have encountered  | I must have been encountering you must have been encountering she must have been encountering we must have been encountering you must have been encountering they must have been encountering  | 
Simple form | V-ing form | 
| I mustn't encounter you mustn't encounter she mustn't encounter we mustn't encounter you mustn't encounter they mustn't encounter  | I mustn't be encountering you mustn't be encountering she mustn't be encountering we mustn't be encountering you mustn't be encountering they mustn't be encountering  | 
Perfect | V-ing perfect | 
| I mustn't have encountered you mustn't have encountered she mustn't have encountered we mustn't have encountered you mustn't have encountered they mustn't have encountered  | I mustn't have been encountering you mustn't have been encountering she mustn't have been encountering we mustn't have been encountering you mustn't have been encountering they mustn't have been encountering  | 
Simple form | V-ing form | 
| must I encounter? must you encounter? must she encounter? must we encounter? must you encounter? must they encounter?  | must I be encountering? must you be encountering? must she be encountering? must we be encountering? must you be encountering? must they be encountering?  | 
Perfect | V-ing perfect | 
| must I have encountered? must you have encountered? must she have encountered? must we have encountered? must you have encountered? must they have encountered?  | must I have been encountering? must you have been encountering? must she have been encountering? must we have been encountering? must you have been encountering? must they have been encountering?  | 
Simple form | V-ing form | 
| mustn't I encounter? mustn't you encounter? mustn't she encounter? mustn't we encounter? mustn't you encounter? mustn't they encounter?  | mustn't I be encountering? mustn't you be encountering? mustn't she be encountering? mustn't we be encountering? mustn't you be encountering? mustn't they be encountering?  | 
Perfect | V-ing perfect | 
| mustn't I have encountered? mustn't you have encountered? mustn't she have encountered? mustn't we have encountered? mustn't you have encountered? mustn't they have encountered?  | mustn't I have been encountering? mustn't you have been encountering? mustn't she have been encountering? mustn't we have been encountering? mustn't you have been encountering? mustn't they have been encountering?  |