Regular verb: burr - burred - burred
Simple form | V-ing form |
I must burr you must burr he must burr we must burr you must burr they must burr | I must be burring you must be burring he must be burring we must be burring you must be burring they must be burring |
Perfect | V-ing perfect |
I must have burred you must have burred he must have burred we must have burred you must have burred they must have burred | I must have been burring you must have been burring he must have been burring we must have been burring you must have been burring they must have been burring |
Simple form | V-ing form |
I must not burr you must not burr he must not burr we must not burr you must not burr they must not burr | I must not be burring you must not be burring he must not be burring we must not be burring you must not be burring they must not be burring |
Perfect | V-ing perfect |
I must not have burred you must not have burred he must not have burred we must not have burred you must not have burred they must not have burred | I must not have been burring you must not have been burring he must not have been burring we must not have been burring you must not have been burring they must not have been burring |
Simple form | V-ing form |
must I burr? must you burr? must he burr? must we burr? must you burr? must they burr? | must I be burring? must you be burring? must he be burring? must we be burring? must you be burring? must they be burring? |
Perfect | V-ing perfect |
must I have burred? must you have burred? must he have burred? must we have burred? must you have burred? must they have burred? | must I have been burring? must you have been burring? must he have been burring? must we have been burring? must you have been burring? must they have been burring? |
Simple form | V-ing form |
must I not burr? must you not burr? must he not burr? must we not burr? must you not burr? must they not burr? | must I not be burring? must you not be burring? must he not be burring? must we not be burring? must you not be burring? must they not be burring? |
Perfect | V-ing perfect |
must I not have burred? must you not have burred? must he not have burred? must we not have burred? must you not have burred? must they not have burred? | must I not have been burring? must you not have been burring? must he not have been burring? must we not have been burring? must you not have been burring? must they not have been burring? |