up·shiftBrE/ˈʌpʃɪft/NAmE/ˈʌpʃɪft/verbpresent simple - I / you / we / theyupshiftBrE/ˈʌpʃɪft/NAmE/ˈʌpʃɪft/present simple - he / she / itupshiftsBrE/ˈʌpʃɪfts/NAmE/ˈʌpʃɪfts/past simpleupshiftedBrE/ˈʌpʃɪftɪd/NAmE/ˈʌpʃɪftɪd/past participleupshiftedBrE/ˈʌpʃɪftɪd/NAmE/ˈʌpʃɪftɪd/ -ing formupshiftingBrE/ˈʌpʃɪftɪŋ/NAmE/ˈʌpʃɪftɪŋ/[I] (NAmE) tochangeintoahighergearinavehicle换高挡(开车等加速)