effective
gb/ɪfˈɛktɪv/ us/ɪfˈɛktɪv/
B1
英语
~ 1100
义项
0 个义项
adjective
B1
property
1
Producing the desired result
Able to produce the result you want.
用法模式：
[something] is effective at [doing something]
常见错误：
Learners sometimes confuse 'effective' with 'efficient'. 'Effective' means it works well, while 'efficient' means it works well with little waste.
近义词
successful (Emphasizes achieving a goal, sometimes with broader scope than 'effective'.)
|
efficient (Focuses on achieving results with minimal waste of time or resources.)
反义词
ineffective (Direct opposite; fails to produce the intended result.)
|
useless (Stronger and more negative; of no practical use.)
搭配
highly effective
|effective method
|effective strategy
|effective communication
|effective treatment
主题
business
|daily life
|problem solving
|core_vocabulary
|work
例句
- This new medicine is highly effective against the virus.
- The training program was effective in improving staff performance.
- Her speech was effective in changing public opinion.
- Regular exercise is effective at reducing stress.
- The new policy proved effective after just a few weeks.
学习者例句
- The new rules are effective in schools.
- This cream is effective for dry skin.
- Exercise is effective for good health.
- The plan is effective and easy to follow.
adjective
formal
B2
property
2
In operation from a given time
Starting to be used or done from a certain time.
用法模式：
effective [date/time]
常见错误：
Learners may confuse this meaning with 'effective' meaning 'good at producing results'; here it refers to the start of official use.
近义词
operative (More technical/legal term for being in force.)
反义词
expired (No longer valid or in effect.)
搭配
effective immediately
|effective date
|effective from
|effective as of
主题
law
|business
例句
- The new law will be effective from January 1st.
- The changes are effective immediately.
- Her promotion is effective as of next Monday.
- The policy becomes effective upon signature.
学习者例句
- The rule is effective today.
- My new job is effective next week.
- The law is effective from May 1.
adjective
formal
C1
property
3
Existing in fact, not formally recognized
Real or true in fact, even if not official.
近义词
actual (Emphasizes real existence regardless of formal status.)
反义词
nominal (Refers to something existing in name only without real power or effect.)
搭配
effective leader (de facto)
|effective control
|effective power
主题
law
|politics
|core_vocabulary
例句
- He is the country's effective ruler, though not elected.
- They have effective control over the region.
- She became the effective head of the department after her boss resigned.
学习者例句
- She is the effective boss here.
- He has effective control of the team.
- They are the effective leaders now.
语法
词典原形
effective
IPA
GB/ɪfˈɛktɪv/
US/ɪfˈɛktɪv/
音节与重音
ef - fect - ive （3 个音节）
Stress on 2nd syllable (fect)
词形变化
Adjective
- Base: effective
词族
Core family
Negative and opposite forms
相关表达
effective date
1/ɪfˈɛktɪv dˈeɪt/
fixed phrase
formal
Official start date of something
The day when something starts to be used or done by law or rule.
例句
- The contract's effective date is July 1st.
- Check the policy's effective date before signing.
effective immediately
1/ɪfˈɛktɪv ɪmˈidiɪtli/
fixed phrase
formal
Starting now without delay
Starting right now, without waiting.
例句
- Your suspension is effective immediately.
- The price increase is effective immediately.