英文原文：
Why does the bus stop?
Why the bus stops?
英式音标：
[waɪ] [dʌz] [before a consonant ðə; before a vowel; ðɪ; stressed; ðiː] [bʌs] [stɒp] ?
[waɪ] [before a consonant ðə; before a vowel; ðɪ; stressed; ðiː] [bʌs] [stɒp] ?
美式音标：
[waɪ] [dʌz] [ðə] [bʌs] [stɑp] ?
[waɪ] [ðə] [bʌs] [stɑːp] ?