ow--ew--own
blow--blew--blown 吹
grow--grew--grown 生长
know--knew--known 知道
throw--threw--thrown 投，掷
overthrow--overthrew--overthrown 推到
draw--drew--drawn 拖，拉
withdraw--withdrew--withdrawn 撤退
sew--sewed--sewn 缝
show--showed--shown 出示