up·changeBrE/ˈʌptʃeɪndʒ/NAmE/ˈʌptʃeɪndʒ/verbpresent simple - I / you / we / theyupchangeBrE/ˈʌptʃeɪndʒ/NAmE/ˈʌptʃeɪndʒ/present simple - he / she / itupchangesBrE/ˈʌptʃeɪndʒɪz/NAmE/ˈʌptʃeɪndʒɪz/past simpleupchangedBrE/ˈʌptʃeɪndʒd/NAmE/ˈʌptʃeɪndʒd/past participleupchangedBrE/ˈʌptʃeɪndʒd/NAmE/ˈʌptʃeɪndʒd/ -ing formupchangingBrE/ˈʌptʃeɪndʒɪŋ/NAmE/ˈʌptʃeɪndʒɪŋ/[I]tochangetoahighergearinavehicle（开车时）换高挡，换成高速挡SYNchange upOPPdownchange