# 2.4.4. 元音 + 元音（Vowel + Vowel）
“元音 + 元音” 的组合之中，会出现**加音**（*intrusion*）。
In combinations of "vowel + vowel", an *intrusion* sound may occur.
前一个元音以 ɪ/i/iː 结尾，会出现加音 ʲ：
When the first vowel ends in ɪ/i/iː, an intrusive ʲ sound emerges:
> - *I am* - ˈaɪ ˈæm ⭢ ˈaɪʲæm
> - *He is* - ˈhiː ˈɪz ⭢ ˈhiːʲɪz
> - *She is* - ˈʃiː ˈɪz ⭢ ˈʃiːʲɪz
> - *They are* - ˈðeɪ ˈɑːr ⭢ ˈðeɪʲɑːr
前一个音节以 ʊ 结尾，比如 ʊ/uː/aʊ/oʊ，会出现加音 ʷ：
Similarly, when the preceding syllable ends in ʊ, such as ʊ/uː/aʊ/oʊ, an intrusive ʷ sound appears:
> - *Go away* - ˈɡoʊ əˈweɪ ⭢ ˈɡoʊʷəˈweɪ
> - *Do all* - ˈduː ˈɔːl ⭢ ˈduːʷɔːl
> - *Do it* - ˈduː ˈɪt ⭢ ˈduːʷɪt
> - *Throw it* - ˈθroʊ ˈɪt ⭢ ˈθroʊʷɪt