有些动词的原形、过去式、过去分词完全一样:
hurt-hurt-hurt; hit-hit-hit; cut-cut-cut; burst-burst-burst; cast-cast- cast; cost-cost-cost;
let-let-let; overcast-overcast-overcast;set-set-set; shed-shed-shed; shut-shut-shut;
slit-slit-slit; thrust-thrust-thrust 等等。
另外,这些词加上前缀构成新的动词后,其原形、过去式、过去分词依然完全一样:
upcast-upcast-upcast; upset-upset-upset; outthrust-outthrust-outthrust ; overcast-overcast-overcast等等。