finished中‘ed’发:/d/
started中‘ed’发:/id/
stopped、talked中‘ed’发:/t/
规律：‘ed’组合在t后发/id/的发音,在清辅音后发/t/,在浊辅音后发/d/
finished stopped started talked辨音
finished中‘ed’发:/d/
started中‘ed’发:/id/
stopped、talked中‘ed’发:/t/
规律：‘ed’组合在t后发/id/的发音,在清辅音后发/t/,在浊辅音后发/d/