64 lines
3.9 KiB
Markdown
64 lines
3.9 KiB
Markdown
# 1.2 音素（Phonemes）
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在自然语音中，不可继续分割的组成部分被称为**音素**（phonemes）。英语的音素分为**元音**和**辅音**。
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In natural speech, indivisible sound segments are referred to as *phonemes*. English language categorizes these phonemes into two types: *vowels* and *consonants*.
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## 1.2.1 元音（Vowels）
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英语总计约有 20 个**元音**。
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English approximately has 20 *vowels*.
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元音可以被分为短元音（*short vowels*）和**长元音**（*long vowels*）；与此同时，它们也可以分为**单元音**（*monophthongs*）和**双元音**（*diphthongs*）。
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Vowels can be classified into *long* and *short* vowels, or alternatively, they can also be grouped as *monophthongs* and *diphthongs*.
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| Monophthongs | | Diphthongs |
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| ------------ | --------------------------------- | ---------------------------------------------- |
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| Short vowels | `ʌ`, `e`, `ə`, `ɪ`, `ʊ`, `ɒ` | |
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| Long vowels | `ɑː`, `æ`, `əː`, `iː`, `uː`, `ɔː` | `aɪ`, `eɪ`, `ɔɪ`, `aʊ`, `oʊ`, `eə`, `ɪə`, `ʊə` |
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6 个基础元音中，`ə` 和 `ɪ` 有相对更多的变体（*allophone*）：
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In the 6 basic vowels, `ə` and `ɪ` have relatively more variants, or *allophones*:
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* `ɪ`：
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* 除了长元音版本 `iː` 之外，还有一个半长版本 `i`，例如 *happy* `/ˈhæp·i/`[^1]；
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* In addition to the long vowel version `i`ː, there's also a semi-long version `i`, as in *happy* `/ˈhæp·i/`.
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* `ə`：
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* 长元音版本 `əː` 在 CEPD[^2] 中被标注为 `ɜː`，例如 *bird* `/bɜːd/` (UK)
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* The long vowel version `əː` is annotated as `ɜː` in the CEPD[^2], like in *bird* `/bɜːd/` (UK).
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* 儿化的短元音 `ə` 被标注为 `ɚ`，例如 *mother* `/ˈmʌð·ɚ/`；
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* The rhotacized short vowel `ə` is annotated as `ɚ`, as in *mother* pronounced `/ˈmʌð·ɚ/`.
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* 儿化的长元音 `əː` 被标注为 `ɝː` 例如 *bird* `/bɝːd/` (US)
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* The rhotacized long vowel `əː` is annotated as `ɝː`, like in *bird* pronounced `/bɝːd/` (US).
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另外，英式英语中还有两个三元音: `aɪə` 比如，*fire* `/faɪə/`；*hour* `/aʊə/`。在英式英语中，这两个三元音被简化为两个双元音的更为明显的儿化音，`aɪə` → `aɪr`，比如，*fire* `/faɪr/`, *hour* `/aʊr/`。
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Furthermore, in British English, there are two triphthongs: `aɪə` as in *fire* pronounced `/faɪə/` and `aʊə` as in *hour* pronounced `/aʊə/`. In American English, these two triphthongs simplify into more apparent rhotacized diphthongs, `aɪə` → `aɪr`, for example, *fire* pronounced `/faɪr/`, and *hour* pronounced `/aʊr/`.
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## 1.2.2 辅音（Consonants）
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英文大约 28 个辅音。
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English approximately has 28 *consonants*.
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| Airflow | Voiced or not | Consonants |
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| --------- | ------------- | ----------------------- |
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| Plosive | Voiceless | `p`, `t`, `k` |
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| | Voiced | `b`, `d`, `g` |
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| Fricative | Voiceless | `f`, `s`, `θ`, `ʃ`, `h` |
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| | Voiced | `v`, `z`, `ð`, `ʒ`, `r` |
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| Affricate | Voiceless | `tʃ`, `tr`, `ts` |
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| | Voiced | `dʒ`, `dr`, `dz` |
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| Nasal | Voiced | `m`, `n`, `ŋ` |
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| Lateral | Voiced | `l` |
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| Semivowel | | `j`, `w` |
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辅音 `t` 在美式英语中有个弹舌音变体，`t̬`，例如，*cutting* `/ˈkʌt̬·ɪŋ/`。
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The consonant `t` has a flapping variant, `t̬`, as in the word *cutting*, pronounced `/ˈkʌt̬·ɪŋ/`.
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[^1]: The middle dot `·` in `/ˈhæp·i/` is an annotation of syllable division. A dot `.` is used in CEPD, but for clearer html rendering, we use a raised one here.
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[^2]: CEPD, Cambridge English Pronunciation Dictionary, https://dictionary.cambridge.org/help/phonetics.html.
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