词尾是 -tion 的单词重音规律
以 -ion 作为词尾的单词，重音一般倒数第2个音节。
词尾的发音：
分为 -tion 和 -ssion、-sion
-tion 和 -ssion 一般念作 / ʃn /
-sion 一般念作 / ʒn /
特殊：/ tʃn /questionsuggestion
本帖只整理 -tion 词尾的常见单词
-tion
information
investigation
election
action
situation
position
education
station
attention
opposition
population
production
addition
nation
organization
condition
administration
competition
construction
operation
solution
immigration
location
option
protection
connection
corruption
conversation
collection
generation
section
application
reaction
cooperation
transition
reputation
transportation
mention
combination
communication
motion
foundation
innovation
selection
creation
tradition
portion
association
recognition
execution
consumption
celebration
distribution
pollution
abortion
caption
constitution
migration
violation
reduction
edition
resignation
exhibition
auction
vacation
destination
infection
participation
regulation
function
intention
indication
acquisition
consideration
contribution
revolution
publication
explanation
registration
donation
demonstration
inspiration
institution
frustration
presentation
conservation
reception
exception
intersection
medication
adoption
promotion
definition
prescription
preparation
inspection
prevention
addiction
caution
exploration
identification
determination
introduction
subscription
invitation
recommendation
organisation
transformation
declaration
evolution
isolation
graduation
concentration
formation
motivation
occupation
injection
fiction
emotion
representation
radiation
correction
interaction
attraction
interpretation
reflection
proportion
relation
expectation
navigation
satisfaction
evaluation
dedication
appreciation
nutrition
examination
corporation
accommodation
imagination
ambition
negotiation
rejection
distinction
authorization
adaptation
recreation
detection
valuation
separation
observation
notification
anticipation
distraction
assumption
prediction
liberation
translation
instruction
conjunction
composition
consolidation
accusation
automation
civilization
eruption
restriction
illustration
affection
invention
desperation
calculation
realization
acceleration
admiration
devotion
deduction
classification
perfection
configuration
accumulation
objection
globalization
重要音变规律
prèparátion
来自动词prepare. 不过注意当他后面加了-ation之后，主重音被吸引到-tion前的相邻音节（á），这样主重音之前就出现两个音节。一般在主重音前面数到两个(偶尔3个)音节会出现一个次重音(prè)，当pre从没有重音到获得重音，产生发音上的变化，从/prɪ/到/'pre/。类似：
expláin → èxplanátion;
decláre →dèclarátion 都是由非重读/ɪ/到重读的/e/。
èxpectátion
词根词缀： ex-出,向外(x发音为ks) + -spect-看(s因和x发音重复而省略) + -ation名词词尾【-ion重音规律】注意由动词变名词后的重音移位，及ex获得次重音后的音变：expect /ɪkˈspekt/expectation /ˌekspekˈteɪʃn/
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