四年级下册一般现在时.docVIP

教师： 学生： 学段： 四 学科： 英语 第 次 - PAGE 1 - 一般现在时 一般现在时的用法 (1) 表示经常发生或习惯性发生的动作时，用一般现在时态。如：I often watch TV at home. (2) 表示客观的事实，用一般现在时态。如：There are seven days in a week. 一般现在时的构成 当句子主语是I, we, they, you或复数名词时，动词用动词原形。 当句子的主语是he, she, it或单数名词时，动词要用第三人称单数的现在式形态。 具体讲解： 特别注意特征词( often usually always sometimes never seldom every+时间) 在句子中的标志作用，在做练习时最好把他们标记出来。 例子：She usually does her homework after dinner. 注意区分好人称，第一，二人称和第三人称复数只需要用动词原形，他们的否定形式是“don’t+动词原形”，他们的疑问形式为“Do…+动词原形…?” 如果是第三人称单数就要作动词的变化。 例子：They go to work by bus on weekdays. They don’t go to work by bus on weekdays. Do they go to work by bus on weekdays? 对于句子中的“doesn’t+动词原形” 及 “Do…+动词原形…?”分别是否定和一般疑问句的形式，一旦遇见“doesn’t” “do”这两个词时，动词必须还原。 The girl likes eating fruits very much. The girl doesn’t like eating fruits at all. Does the girl like eating fruits? 1. 标识词，特征词：often usually always sometimes never seldom every+时间 2. 构成： 主语是一(I/we).二人称(you) 及复数形式(they)：人/物+动词原形 例子：I/We often go to school on time every day. 否定形式：…don’t + 动词原形 例子：I/We don’t often go to school on time every day. 提问：Do…+动词原形…? Yes,…do. No,…don’t. 例子：Do you often go school on time every day? Yes, I do. No, I don’t. 第三人称单数（he/she/it以及一个人/物）： 人/物+动词未尾+“s”或“es” 例子：a. He/She usually goes to school by car every day. b. Janet/Ben has lunch at 12:00 every day. c. The cat eats a fish every day. 3. 动词的变化：动词末尾+ “s” 或 “es” （1）一般情况下，在动词后面+s，如：looklooks eateats （2）以“s”， “x” “sh” “ch” “o”结尾的单词在词尾+“es”，如：watchwatches washwashes catchcatches teachteaches （3）以辅音字母+“y”结尾的单词，把“y”改为“i”再+“es”,如：flyflies carrycarries trytries （4）特殊形式： havehas 4. 否定形式：…doesn’t+动词原形 例子：The old man plays chess in the morning. The old man doesn’t play chess in the morning. 5．提问：Does…+动词原形…? Yes,…does. No,…doesn’t. 例子：Does the old man play chess in the morning? Yes,he does. No, he doesn’t. 巩固练习 选择正确的答案填空，将其字母编号写在题前的括号内。 （ ）1. My mother_______ housework every day. A. did