📝 语法指南
⏰ 英语时态
一般现在时 (Simple Present)
用于描述经常发生的动作、习惯、真理或现在的状态。
结构： 主语 + 动词原形/动词第三人称单数形式
结构： 主语 + 动词原形/动词第三人称单数形式
✓ I work in a bank.
✓ She speaks English fluently.
✓ The sun rises in the east.
选择正确的句子：
现在进行时 (Present Continuous)
用于描述正在进行的动作或临时的情况。
结构： 主语 + be动词 + 动词-ing形式
结构： 主语 + be动词 + 动词-ing形式
✓ I am reading a book now.
✓ They are playing football.
✗ I am read a book now.
一般过去时 (Simple Past)
用于描述过去发生的动作或状态。
结构： 主语 + 动词过去式
结构： 主语 + 动词过去式
✓ I visited Paris last year.
✓ She was a teacher.
✓ We went to the cinema yesterday.
📄 冠词的使用
定冠词 "the"
用于特指某个人或物，或者双方都知道的事物。
✓ The book on the table is mine.
✓ The sun is shining.
✓ I saw the movie you recommended.
不定冠词 "a/an"
用于泛指某类事物中的一个。"a" 用于辅音音素开头的词前，"an" 用于元音音素开头的词前。
✓ I need a pen.
✓ She is an engineer.
✓ It's an honor to meet you.
🔗 介词的使用
时间介词
at, on, in 用于不同的时间表达。
✓ at 3 o'clock, at night, at Christmas
✓ on Monday, on July 4th, on my birthday
✓ in 2023, in summer, in the morning
地点介词
at, on, in 也用于不同的地点表达。
✓ at home, at school, at the station
✓ on the table, on the wall, on the first floor
✓ in the room, in London, in the box
❓ 条件句
第一条件句 (First Conditional)
用于描述真实可能发生的情况。
结构： If + 一般现在时, will + 动词原形
结构： If + 一般现在时, will + 动词原形
✓ If it rains, I will stay home.
✓ If you study hard, you will pass the exam.
第二条件句 (Second Conditional)
用于描述假想的或不太可能发生的情况。
结构： If + 一般过去时, would + 动词原形
结构： If + 一般过去时, would + 动词原形
✓ If I won the lottery, I would travel the world.
✓ If I were you, I would apologize.
🔄 被动语态
被动语态的构成
结构： be动词 + 过去分词
用于强调动作的承受者而非执行者。
用于强调动作的承受者而非执行者。
✓ The book was written by Shakespeare.
✓ English is spoken all over the world.
✓ The house will be built next year.
💭 情态动词
can / could
表示能力、可能性或请求许可。
✓ I can swim. (能力)
✓ Can I help you? (请求)
✓ It could rain tomorrow. (可能性)
must / have to
表示必须、义务或强烈的建议。
✓ You must wear a seatbelt.
✓ I have to go to work.
✓ You must be tired after the long journey.
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