gh在下列五种情况下不发音
1.gh 在
元音字母i后不发音.
例:bright/brait/,fight/fait/,frighten/'fraitn/,high/hai/,light/lait/,might/mait/,night/nait/,right/rait/,sight/sait/,slight/slait/
2.gh在元音字母组合ei和ai后不发音.
例:eight/eit/,eighth/eitθ/,neighbor/'neibə/,straight/streit/,weigh/wei/,weight/weit/
3.gh在字母组合ought中不发音.
例:bought/bɔ:t/,brought/brɔ:t/,fought/fɔ:t/,thought/θɔ:t/
4.字母组合augh前面不是1时,gh不发音.
caught/kɔ:t/,daughter/'dɔ:tə/,naught/nɔ:t/,naughty/'nɔ:ti/,taught/tɔ:t/
5.词尾为ough的词,如以上所述,有的发/f/,但有时也不发音.
例:although/ɔ:l'ðəu/,plough/plau/,through/θru:/,though/ðəu/,thorough/'θʌrə/
注意:若gh不是字母组合,而是分属于前后两个不同的音节时,不适合以上规则.