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AI 英语语法知识库
时态
Tenses
9
一般现在时
Simple Present Tense
一般将来时
Simple Future Tense
一般过去时
Simple Past Tense
现在完成时
Present Perfect Tense
现在完成进行时
Present Perfect Continuous Tense
过去完成时
Past Perfect Tense
现在进行时
Present Continuous Tense
过去进行时
Past Continuous Tense
将来进行时
Future Continuous Tense
从句
Clauses
7
定语从句
Relative Clauses
名词性从句
Noun Clauses
状语从句
Adverbial Clauses
宾语从句
Object Clauses
主语从句
Subject Clauses
同位语从句
Appositive Clauses
条件状语从句
Conditional Clauses
非谓语动词
Non-finite Verbs
6
动名词
Gerunds
不定式
Infinitives
现在分词
Present Participles
过去分词
Past Participles
非谓语作主语
Non-finite as Subject
非谓语作状语
Non-finite as Adverbial
句子结构
Sentence Structures
4
主谓宾结构
SVO Structure
并列句
Compound Sentences
复合句
Complex Sentences
平行结构
Parallel Structures
学术写作
Academic Writing
5
正式语气
Formal Tone
避免口语化
Avoiding Informal Language
学术句型
Academic Sentence Patterns
段落结构
Paragraph Structure
论证表达
Argumentative Structures
PTE 高频语法
PTE Grammar Patterns
4
Essay 高频句型
Essay Structures
SST 学术句型
SST Academic Structures
WFD 高频结构
WFD Sentence Patterns
Speaking 常用表达
Speaking Structures
从句
Clauses
中级到高级
宾语从句
Object Clauses
宾语从句是名词性从句的一种,在句中充当动词、介词或某些形容词后的宾语。它常由 that, whether, if, what, why, how, when, where, who 等连接词引导。对于准备 PTE Academic 和 IELTS 的中国考生来说,宾语从句非常重要,因为它可以帮助考生在写作和口语中表达观点、转述信息、解释原因、描述研究发现,并提高句子复杂度。掌握宾语从句时,需要特别注意陈述语序、时态一致、连接词选择以及间接疑问句的结构。
核心语法结构
Grammar Formula
主语 + 谓语动词 / 形容词 / 介词 + 连接词 + 主语 + 谓语 + 其他成分
PTE 高频程度
高频
AI 学习推荐
Core Grammar
适用考试
PTE / IELTS
语法结构
Grammar Structure
结构公式
主语 + 谓语动词 / 形容词 / 介词 + 连接词 + 主语 + 谓语 + 其他成分
宾语从句在主句中充当宾语,通常放在动词之后,例如 believe, think, suggest, indicate, explain, demonstrate, assume, argue 等。在学术英语中,宾语从句常用于表达研究结论、作者观点或数据说明。宾语从句内部必须使用陈述语序,即“连接词 + 主语 + 谓语”,不能使用疑问语序。例如,应说 I do not know why this trend occurred,而不是 I do not know why did this trend occur。that 引导的宾语从句主要陈述事实或观点;whether 和 if 表示“是否”;wh- 连接词用于引导包含具体疑问信息的宾语从句。
Researchers believe that early intervention can improve learning outcomes.
研究人员认为,早期干预可以改善学习结果。
The survey shows that many students prefer flexible learning schedules.
调查显示,许多学生更喜欢灵活的学习时间安排。
Many people wonder whether artificial intelligence will replace certain jobs.
许多人想知道人工智能是否会取代某些工作。
The lecturer explained why renewable energy has become more affordable.
讲师解释了为什么可再生能源变得更加便宜。
使用场景
Usage Scenarios
表达观点和判断
宾语从句常用于 think, believe, argue, assume, claim, suggest 等动词之后,用来表达个人观点、学术判断或论证立场。在 IELTS Writing Task 2 和 PTE Essay 中,这类结构可以使观点表达更自然、更正式。
I believe that governments should invest more in public transportation.
我认为政府应该在公共交通方面投入更多资金。
Some experts argue that online education can reduce educational inequality.
一些专家认为,在线教育可以减少教育不平等。
It is widely assumed that economic growth depends partly on technological innovation.
人们普遍认为,经济增长在一定程度上依赖技术创新。
转述信息和研究发现
在学术写作和听力复述中,宾语从句可用于报告研究、讲座、图表或文章中的信息。常见动词包括 show, indicate, reveal, suggest, demonstrate, report, find 等。
The data indicate that household energy consumption has declined over the past decade.
数据显示,过去十年家庭能源消耗已经下降。
The study found that regular exercise may reduce stress levels among university students.
该研究发现,规律锻炼可能降低大学生的压力水平。
The graph shows that the number of international students increased steadily.
图表显示,国际学生人数稳步增加。
构成间接疑问句
当一个疑问句作为宾语放入另一个句子时,就形成间接疑问句。间接疑问句必须使用陈述语序,而不是疑问语序。这一点是中国考生在 PTE Speaking 和 IELTS Speaking 中的高频错误点。
Could you explain how this policy affects low-income families?
你能解释这项政策如何影响低收入家庭吗?
The professor asked whether the students had understood the main argument.
教授询问学生是否理解了主要论点。
I am not sure why the experiment produced different results.
我不确定为什么这个实验产生了不同的结果。
表达不确定性和评价
宾语从句可以放在 be certain, be aware, be concerned, be convinced, be interested 等形容词结构之后,用于表达确定性、意识、担忧或兴趣。在正式写作中,这类结构有助于增强语义层次。
Many parents are concerned that excessive screen time may affect children's concentration.
许多家长担心,过度使用屏幕可能影响儿童的注意力。
Policy makers are aware that climate change requires long-term cooperation.
政策制定者意识到,气候变化需要长期合作。
Researchers are interested in how social media influences political participation.
研究人员对社交媒体如何影响政治参与感兴趣。
常见错误
Common Mistakes
Incorrect
❌ I don't know why did he choose this method.
Correct
✅ I don't know why he chose this method.
宾语从句中的间接疑问句必须使用陈述语序。“why he chose this method”才是正确结构,不能保留疑问句中的助动词倒装“did he choose”。
Incorrect
❌ The report shows the unemployment rate increased.
Correct
✅ The report shows that the unemployment rate increased.
在非正式英语中 that 有时可以省略,但在学术写作中,尤其是句子较长或信息较复杂时,保留 that 可以让结构更清晰。PTE 和 IELTS 写作中建议优先使用清楚完整的表达。
Incorrect
❌ I am agree that education is important.
Correct
✅ I agree that education is important.
agree 是动词,不能与 be 动词连用。中国学习者常受中文“我是同意的”影响而误写为 am agree。正确表达是“I agree that...”。
Incorrect
❌ She asked that whether the results were reliable.
Correct
✅ She asked whether the results were reliable.
that 和 whether 通常不能同时引导同一个宾语从句。whether 本身已经表示“是否”,不需要再加 that。
Incorrect
❌ Many people believe that technology will improves education.
Correct
✅ Many people believe that technology will improve education.
情态动词 will 后必须接动词原形。宾语从句中虽然有独立的主语和谓语,但仍然要遵守基本动词形式规则。
Incorrect
❌ He said that he is tired yesterday.
Correct
✅ He said that he was tired yesterday.
当主句谓语是过去时 said,且从句描述的是过去当时的状态时,从句通常也要使用过去时。这属于宾语从句中的时态一致问题。
Incorrect
❌ The lecturer mentioned about that the population was aging.
Correct
✅ The lecturer mentioned that the population was aging.
mention 是及物动词,后面可以直接接宾语或宾语从句,不需要加 about。可以说 talked about that issue,但不能说 mentioned about that。
学术表达
Academic Patterns
The evidence suggests that + clause.
证据表明……
The data indicate that + clause.
数据显示……
It can be argued that + clause.
可以认为……
Researchers have found that + clause.
研究人员发现……
The author claims that + clause.
作者声称……
This implies that + clause.
这意味着……
The findings demonstrate that + clause.
研究结果证明……
It remains unclear whether + clause.
目前尚不清楚是否……
The report explains how + clause.
报告解释了……如何……
Policy makers should consider whether + clause.
政策制定者应该考虑是否……
PTE 高频应用
PTE Usage
宾语从句在 PTE Academic 中非常常见,尤其出现在 Summarize Written Text, Write Essay, Retell Lecture, Summarize Spoken Text 和 Answer Short Question 的答案组织中。考生需要用宾语从句准确转述文本或讲座信息,例如 The speaker explains that..., The passage suggests that..., The research indicates that...。在口语部分,宾语从句可以帮助考生避免句子过短,提高语法复杂度;在写作部分,它可以帮助表达因果、观点、发现和不确定性。需要注意的是,PTE 评分重视 grammatical range and accuracy,因此宾语从句应保持语序正确、连接词准确、时态一致。
Speaking: Retell Lecture
Speaking: Describe Image
Writing: Summarize Written Text
Writing: Write Essay
Listening: Summarize Spoken Text
Reading & Writing: Fill in the Blanks
高频搭配
Common Collocations
believe that
认为……
argue that
主张……;认为……
suggest that
表明……;建议……
indicate that
显示……;表明……
demonstrate that
证明……
assume that
假设……;认为……
be aware that
意识到……
be concerned that
担心……
wonder whether
想知道是否……
explain why
解释为什么……
show how
展示如何……
find out whether
查明是否……
AI 学习建议
AI Learning Tips
写作中如果需要表达观点,可以优先使用“I believe that...”“It can be argued that...”“The evidence suggests that...”等结构,比简单句更符合学术表达。
遇到 why, how, where, when 引导的宾语从句时,先检查语序是否为“连接词 + 主语 + 谓语”,不要使用疑问句倒装。
在 PTE Summarize Written Text 中,宾语从句适合用来整合原文核心信息,例如“The passage explains that...”或“The author suggests that...”。
如果主句是过去时,转述内容通常需要注意时态后移,但客观真理、科学事实或仍然成立的事实可以保持一般现在时。
that 引导的宾语从句在口语中可省略,但在正式写作中保留 that 往往能提升句子清晰度。
AI 练习题
Practice Questions
改正句子:I don't know where does she live.
答案:I don't know where she lives. 解释:宾语从句要使用陈述语序,即 where + 主语 + 谓语。
用宾语从句翻译:许多专家认为,城市化会影响住房价格。
答案:Many experts believe that urbanization can affect housing prices.
选择正确句子:A. The study indicates that sleep affects memory. B. The study indicates that does sleep affect memory.
答案:A。解释:that 引导的宾语从句使用陈述语序,不能使用疑问语序。
将直接疑问句改为宾语从句:Why did the company change its policy? → The journalist asked...
答案:The journalist asked why the company changed its policy.
用 whether 完成句子:Policy makers should consider ______ public transport is affordable for low-income groups.
答案:Policy makers should consider whether public transport is affordable for low-income groups.
改正句子:The lecturer mentioned about that climate change affects agriculture.
答案:The lecturer mentioned that climate change affects agriculture. 解释:mention 是及物动词,后面不需要 about。
用 academic pattern 造句,表达“数据表明网络购物越来越受欢迎”。
答案:The data indicate that online shopping is becoming increasingly popular.
判断是否正确:I wonder whether will technology replace teachers.
答案:不正确。正确句子是:I wonder whether technology will replace teachers. 解释:whether 引导的宾语从句中,will 应放在主语 technology 后面。