Kenneth G. Wilson (1923–). The Columbia Guide to Standard American English. 1993.
burn (v.)
The principal parts are burn, burned or burnt, burned or burnt. Burned is much more common in both transitive and intransitive use in American English: We burned the rubbish. The last bridge had burned. British English uses burnt more frequently, especially in intransitive use. The participial adjectives in the United States are both burned and burnt. Both burned and burnt are used in compounds too, and all these uses are Standard. Compare CREEP.
