happening 为什么不双写n?可不可以详细说明加ing的具体规则?

网友回答

1.直接加ing do---doing
2.以不发音的e结尾的,去e加ing dance--dancing
3.以重读闭音节,而且末尾只有一个辅音字母结尾的,双写这个辅音字母,再加ing.get--getting
begin--beginning
happen不是重读闭音节,重读是ha.
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多谢你的问题!
======以下答案可供参考======
供参考答案1:
重读闭音节结尾的词才要双写，也就是末尾是“辅音+元音+辅音”的音节，重音还必须在这个音节上。
供参考答案2:
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Rule 1: Words ending with a Consonant-Vowel-Consonant Pattern
(Review Consonants and Vowels)
One-syllable words:
ED = If the word ends in a CVC pattern, it gets a double consonant + ED. * note
ING = If the word ends in a CVC pattern, it gets a double consonant + ING. * note
Examples:
ED = RUB > rubbed, STOP > stopped
ING = HOP > hopping, SIT > sitting
*note: Words ending in w,x,y,z do not follow this rule, simply add ED, or ING
Examples:
snow > snowed, box > boxing, play > playing Two-syllable words:
ED = If the stress is on the first syllable, the word only gets one consonant + ED.
ING = If the stress is on the first syllable, the word only gets one consonant + ING.
Examples:
visit > visited, open > opened
happen > happening, enter > entering
ED = If the stress is on the second syllable, the word gets a double consonant + ED.
ING = If the stress is on the second syllable, the word gets a double consonant + ING.
Examples:
refer > referred, admit > admitted
begin > beginning, permit > permitting
Consonants = b, c, d, f, g, h, j, k, l, m, n, p, q, r, s, t, v, w, x, y, z
Vowels = a, e, i, o, u
Practice two-syllable ed-ing endings...
Rule 2: Words ending in E
ED = If the word ends in E, simply add D
ING = If the word ends in E, drop the E, add ING
Examples:
ED = smile > smiled, fine