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