在浊辅音和元音后面 [d]called borrowed moved[mu:vd] enjoyedwelcomed answered 在清辅音后面 [t] finishedhelped[helpt]passed[pa:st] reached在[t]音后面 [id] wanted['wCntid] started['sta:tid][d]音后面[id] needed['ni:did] counted['kauntid]