英语语法精品教学完整ppt课件

1）“能力”，“许可”，“可能性”，口语 中，can 可以代替 may 表示许可，而 may 更正式。
• Some of us can use the computer. （能力）
• You can go now. （许可）
23｛)）cCouanld
代替 can 表示委婉。 （现在时；过去式）
be able to （多种形式）
• So fast did he run that he fell over.
• Often did he go to see a doctor last year.
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• 7.以Now; Then 等时间副词开头的句子。
• Now comes your turn. • Then followed the teacher’s comment. • 8. 虚拟语气倒装
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• 倒装句（Inversion）：谓语的全部或一部分 放在主语之前。
• 原因：1、语法结构的需要 2、表强调
• 固定倒装：1、疑问句 2、there be 句式
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• 1、在here; there; out; in; up; oபைடு நூலகம்er; back; down; away; forward; off; high 等方位副词 开头的句子。 • Here comes the bus.
I haven’t been able to find the book.
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• 2. may, might “可以”， 否定 may not, “禁 止”，“阻止”，常用must not (mustn’t 代 替may not)。
• — May I watch TV ? — Yes, you may . No, you mustn’t 或 No, You may not.
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• 特殊：（三种） • 1. Boy as he is, he can … • 2. Neither 句…子（倒）nor 句…子（倒）
Not until句子…（倒）but also句…子（正）
• 3. No sooner … than …
Had+主语+动词
过去式
} Hardly
when
Scarcely
• Out rushed the children.
• Away went the boy.
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• 主语是人称代词时，主谓语序不变(正常语 序)。
• Here it is.
• Here you are. • Here is the money.
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• 3.Only 所修饰的副词、介词短语或状语从 句放到句首时。
GRAMMARS
Teacher: REX
定语从句（The Attributive Clause）：在 复合句中，修饰某一名词或代词的从句。
• 1. A plane is a machine that can fly.
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• 2.Who is the man that is reading the newspaper over there?
• 3.A chemist’s shop is a shop which sells medicine.
• 4.The film which we saw last night was great.
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• 5.Wei Fang is the student whose home caught fire last week.
• 6.This is the house _w__h_e_re_ I lived two years
ago.
in which
• 7. I still remember the day _w__h_e_n_ I first came to Beijing.
• 8. The factory _w__h_e_re_ his father works is in the west of the city.
• Only then did I realize that I was wrong.
• Only in this way can you learn from your mistakes.
• Only when the war was over in 1918 was he able to get happily back to work.
No, you’d better not.
Might 语气委婉，或更加不肯定
He might be right.
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• 3. must, have to 1) must 表示“必须”，“应该”，must not (mustn’t)表示不应该，不准。
— Must I be home before 8 o’clock? — yes, you must.
No, yo｛u needn’t.
don’t have to.
must与 have to的区别
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• 4. ought to 比should 语气更重一些。 He ought to go. — Ought he to go? — Yes, he ought (to) .
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• 4.含有否定意义的副词或连词 Hardly; Never; Not; Little; Few; Seldom; Not until; Scarcely等 放到句首时。
• Never shall I forget it.
• Little does he care about what others think.
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• 5. “ So do I ” 句式。
• So am I.
• Neither am I.
Nor }
• So it is with sb . was
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• 6.以So; Such; Thus; 等程度副词或Often; Always; Once; Many a time 等频度副词开头 的句子。
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情态动词（Modal Verbs）: 表示说话人对某一动作 或状态的态度，认为“可能”，“应当”，“必 要”。
• 特点： 1. 不能单独作谓语，必须和不带to的不定式 连用（即动词原形，ought 除外）。 2. 没有人称和说的变化。 3. 朗读时，它的肯定式一般不重读。
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• 1. can, could