teetheBrE/tiːð/NAmE/tiːð/verbpresent simple - I / you / we / theyteetheBrE/tiːð/NAmE/tiːð/present simple - he / she / itteethesBrE/tiːðz/NAmE/tiːðz/past simpleteethedBrE/tiːðd/NAmE/tiːðd/past participleteethedBrE/tiːðd/NAmE/tiːðd/ -ing formteethingBrE/ˈtiːðɪŋ/NAmE/ˈtiːðɪŋ/[I]whenababyisteething, itsfirstteetharestartingtogrow（幼儿）出牙，长牙