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课件网) Welcome Unit Discovering Useful Sentences Learning objectives At the end of this lesson, students are able to: 1. Have a good understanding of the basic sentence structures and basic components of a sentence. 2. Identify the basic sentence structures—SV; SVO; SP; SV IO DO; SVOC; SVA; SVOA; There be... 3. Learn to analyze the structure of the sentences from the text. 4. Master and use the basic sentence structures flexibly. To see is to believe. What he has said is true. TV news often gives us lots of information. Cycling and boating are my favorite free time interests. 主语：句子的主体；谓语陈述、说明的对象，说明动作由“谁”发出。 It drives me mad to teach her. It’s a pity that you missed the exciting football match. 注意：主语一般位于句首，但若不定式(短语)、动名词(短语)、名词性从句作主语，常用it作形式主语，则把真正的主语放在句后。 主语 形式主语（形式上的主语）和真正主语（真正的主语） 原因：常用作形式主语的是代词it。当主语过长时，可以先用代词it作为形式上的主语，而把真正的主语放在句子尾部，避免句子“头重脚轻”，影响平衡美感。 例1：动词不定式短语作主语 参照：To get to school usually takes me thirty minutes. 例句：It usually takes me thirty minutes to get to school. 例2：主语从句作主语 参照：That we have to work more than ten hours every day is a fact. 例句：It is a fact that we have to work more than ten hours every day. 例3：动名词短语作主语 参照：Pretending to work hard in front of others is no good for oneself. 例句：It is no good for oneself pretending to work hard in front of others. 找出下列句子的主语。 即学即练 Country music has become mmore and more popular. We often speak English in class. One-third of the students are girls. To swim in the pool is a pleasure. Smoking does harm to the health. The rich should help the poor. When we are going to have a day off has not been decided. It is necessary to master a foreign language. 名词 代词 数词 动词不定式 形容词名词化 动名词 句子作主语， 主语从句 it作形式主语，不定式为真正主语 谓语 谓语：表示主语的行为或状态；是英语句子的灵魂、核心。一般在主语之后。 谓语中最重要的是谓语动词 (通常由实义动词充当)，它有时态，语态的变化，并受主语人称和数的影响。 简单谓语：由动词或动词词组组成 He practices running every morning. Tom looks forward to meeting the new exchange student. 复合谓语：由情态动词或助动词+动词组成 He can speak English well. I will return you the book tomorrow. 及物动词 & 不及物动词 及物动词（vt.） 不及物动词（vi.） 及物动词后必须跟有动作的对象（即宾语） 可直接跟宾语。 有被动语态。 不及物动词后不能直接跟有动作的对象（即宾语）。 若要跟宾语，必须先在其后加上某个介词。 无被动语态。 如play, visit, see, like, take, give 如look, cry, agree, walk, go, happen He visited his grandparents yesterday. Please look at this picture carefully. They can speak English well. He looked after two boys. They enjoyed playing computer games. We have finished reading this book. 找出下列句子的谓语。 即学即练 宾语 宾语：动作的承受者，表示行为或活动的对象 ... ...
