# 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/`<span class="speak-word-inline" data-audio-us-male="/audios/us/I-am-us-male.mp3" data-audio-us-female="/audios/us/I-am-us-female.mp3"></span>
> - *He is* - `/ˈhiː ˈɪz/` ⭢ `/ˈhiːjɪz/`<span class="speak-word-inline" data-audio-us-male="/audios/us/He-is-us-male.mp3" data-audio-us-female="/audios/us/He-is-us-female.mp3"></span>
> - *She is* - `/ˈʃiː ˈɪz/` ⭢ `/ˈʃiːjɪz/`<span class="speak-word-inline" data-audio-us-male="/audios/us/She-is-us-male.mp3" data-audio-us-female="/audios/us/She-is-us-female.mp3"></span>
> - *They are* - `/ˈðeɪ ˈɑːr/` ⭢ `/ˈðeɪjɑːr/`<span class="speak-word-inline" data-audio-us-male="/audios/us/They-are-us-male.mp3" data-audio-us-female="/audios/us/They-are-us-female.mp3"></span>

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/`<span class="speak-word-inline" data-audio-us-male="/audios/us/Go-away-us-male.mp3" data-audio-us-female="/audios/us/Go-away-us-female.mp3"></span>
> - *Do all* - `/ˈduː ˈɔːl/` ⭢ `/ˈduːwɔːl/`<span class="speak-word-inline" data-audio-us-male="/audios/us/Do-all-us-male.mp3" data-audio-us-female="/audios/us/Do-all-us-female.mp3"></span>
> - *Do it* - `/ˈduː ˈɪt/` ⭢ `/ˈduːwɪt/`<span class="speak-word-inline" data-audio-us-male="/audios/us/Do-it-us-male.mp3" data-audio-us-female="/audios/us/Do-it-us-female.mp3"></span>
> - *Throw it* - `/ˈθroʊ ˈɪt/` ⭢ `/ˈθroʊwɪt/`<span class="speak-word-inline" data-audio-us-male="/audios/us/Throw-it-us-male.mp3" data-audio-us-female="/audios/us/Throw-it-us-female.mp3"></span>