时态(一般现在时 一般过去时 一般将来时).ppt

Grammar 1946 2017 2020 The Past ED 时代 过去某个时间发生的动作或者存在的状态 Will 时代 将来某个时间要发生的动作或存在的状态 The Present The future Verb 时代 真理；主语的状态、特征，经常或反复发生的动作 Verb Tenses The moon moves round the earth. Do you like smoking? 你我和大家， （You，I and they） 动词不变化。 （the Verb stays ） The Simple Present Tense 单数三人称， （if only one ） 带个小尾巴。 （”S” to the end） 一、一般现在时( simple present tense) 1.形式 一般现在时通常用动词原形来表示。be动词用am、is、are。主语是第三人称单数时动词的变化规律: 一般动词后加-s；以s、x、ch、sh结尾，加-es；以辅音字母加o结尾，一般加-es；辅音字母加y结尾，变y为i加-es。 2．用法 a. 表示经常发生的动作或现阶段的习惯性行为，常与时间状语often， usually，always，every day，sometimes， seldom，never等连用。 I never do my homework in the evening. Sometimes we play football on the playground. He seldom listens to music.b. 表示现在的事实或状态。 China is a developing country. I like English very much.c. 表示格言，科学事实和客观真理。Pride goes before a fall.　骄者必败。 All things are difficult before they are easy. 凡事总是由难而易。 Shanghai lies in the east of China.上海位于中国东部。 The teacher told us yesterday that December 25 is Christmas Day. 3.句式 肯定 否定 疑问 回答 He likes eggs. He doesn’t like eggs. Does he like eggs? Yes, he does./No, he doesn’t. I want an apple. I don’t want an apple. Do you want an apple? Yes, I do./No, I don’t. 4.做题时常见错误如下： 一、be动词与行为动词同时出现在句子中 例：We are plant the trees in spring. 二、单三人称形式易出错 例：1. He play football very well. 2. Danny goes (go) to school at 7:10. 三、在句式变换时易出错 例：1. Does Jenny has a good friend? 2. Brian doesn’t lives in China. 四、对do的理解易出错 例：We not do our homework in the afternoon. 五、对主语的数判断有误 例： Li Ming with me are in Beijing. 另外，宾语从句中，从句部分若是表示客观真理，不管主句是何时态，从句都要用一般现在时；在时间和条件状语从句中，主句表将来，从句要用一般现在时。 1.Mary___________ the piano well. She is often asked to play at the concert. A. play B. plays C. playing D. played 2.My mother will take me to the movie if she _________ free this weekend. A. is B. will be C. was D. would be 3.The girls will have a trip if it _________fine. A. is B. was