请赐教英美发音的不同?

元音区别A：
当字母r出现在单词的元音字母组合中时,北美英语会出现独特的卷舌音。
are bird here hair door
注意：卷舌音的发音技巧 1。舌头轻轻抬高,向后卷起
2。下唇配合下颌骨一起向前探
1。far car large charg smart
2。dear clear fear cheer here
3。air dare pear their where 4。for more door pour before
5。sure poor tour cure fewer 6。her turn learn word first
7。fire tired higher liar buyer 8。hour flour shower power tower
9。destroyer employer
元音区别B：
英语中的元音/a:/在用于//f,θ,或鼻音前时,美语发音为/æ/,但字母组合ml前发音不变仍为/a:/,除father,plaza,Chicago不变
以下单词在英式中发/a:/音,在美式中发/ ae/：
half bath pass sample dance
但在calm palm 中不变。
辅音区别：
/hw/的读法：辅音连缀wh,英国人读/w/,美国人读/hw/。但在字母O前,都读/h/。
what where which who somewhere bobwhite meanwhile overwhelm whole wheat
The bobwhite whistled somewhere in the wheat。He only heard a wheel creak and wine。
The man with the whip whistled through his whiskers。The wheel came off somewhere with a whirling sound。
Why does he whine and whimper everywhere?Who’s whipping the white horse?