Tham khảo tài liệu 'longman grammar of spoken and written english part 31', ngoại ngữ, ngữ pháp tiếng anh phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | Single-word lexical vert 397 Table Percentage use of irregular v. regular forms where both variants can be used as either past tense or participle R regular form used over 85 of the time r regular v. irregular form used over 50 of the time ir irregular v. regular form used over 50 of the time IR irregular v. regular form used over 75 of the time Combined total of both regular and irregular forms is less than three per million conversation fiction BrE news academic past tense past participle past tense past participle past tense past participle past tense past participle snuck v. sneaked - - R - R - - - dove v. dived - - R - R - - - knit v. knitted - - R - - - - - leant v. leaned - - r R - - - - dreamt v. dreamed - - r r r - - - spoilt v. spoiled - IR - ir R ir - - learnt v. learned ir IR r r r r r r burnt v. burned IR IR r r r r ir r smelt v. smelled IR - ir ir ir - - - spelt v. spelled IR IR ir - ir - - - leapt v. leaped - - ir ir IR IR - - hung v. hanged IR IR IR IR ir r IR - quit v. quitted - - - - IR IR - - sped v. speeded - - IR - IR - - - wed v. wedded - - - - IR - IR - lit v. lighted IR - IR IR IR - - - Table Percentage use in BrE v AmE news of irregular v. regular forms where both variants can be used as either past tense or participle BrE news AmE news past tense past participle past tense past participle leant v. leaned - - R - dreamt v. dreamed r - R R burnt v. burned r r R R learnt v. learned r r R R spoilt v. spoiled R ir R R smelt v. smelled ir - R - leapt v. leaped IR IR r R spelt v. spelled ir - R R lit v. lighted IR - r r sped v. speeded IR - IR - hung v. hanged ir r IR ir quit v. quitted IR IR IR IR 398 VERBS Overall frequency of the target verb is not a decisive factor influencing this choice. For example lean and learn are high-frequency verbs that favor the regular variant while hang is a high frequency verb that favors the irregular variant. At the other extreme sneak is a relatively rare verb that favors the regular variant while .