[t]	[d]	[id]
worked	cleaned	invited
watched	stayed	visited
faced	learned	shouted
relaxed	waited	founded

• 清音结尾，加-ed后要发 [t]
• 浊音结尾，加-ed后要发 [d]
• 以[t]或[d]结尾，加-ed后要发 [id]