(
课件网) 什么是一般现在时？ 一般现在时是表示经常反复发生的动作 和存在的状态或习惯性动作的时态。 一般现在时 一般现在时的结构是什么呢？ 句式结构：主语+行为动词（动词原形或动词第三人称单数）+其他成分 主语+be动词（is, am, are）+其他成分 一般现在时的结构 Tom likes playing basketball. 主语 谓语 Tom is a good boy. 主语 谓语 一般现在时的用法 1.一般现在时的基本用法 2. be动词的变化 3.行为动词的变化 1.表示经常性或习惯性的动作或行为。常与always，usually, often, sometimes, every day连用。如： He often gets up early. She goes home on foot every day. 2. 表示现在的状态、能力、性格、个性。如： I am a flight attendant. Lin Yan works as a teacher in a high school. 3. 客观事实或普遍真理。如：The sun rises in the east. 1.一般现在时的基本用法 2.be动词的变化 ① be动词随人称的改变； I _____ a student. You _____ a student. He/she _____ a student. It_____ a cat. We _____ good friends. They _____ good friends. 小试牛刀 am are is is are are 2.be动词的变化 ① be动词随人称的改变； He_____ a firefighter. There _____ two students in the classrrom. There _____ some milk in the cup. There_____ three pears. My father _____ a doctor. Your grandma _____ a nurse. 小试牛刀 is are is are is is . ② 一般现在时变成一般疑问句： 句子结构：Be+主语+其他？ 顺口溜：be动词提前—其他成分照抄—句号改问号 例子: she is a student.———Is she a student 肯定回答：Yes,she is. 否定回答： No, she is not/ isn’t. He is an English teacher.(变为一般疑问句) _____ Is he an English teacher 2.be动词的变化 ③ 一般现在时的否定句 句子结构： 主语+ be + not +其他 eg: He is a worker.--He is not a worker. He is my good friend .(变为否定句) _____ I am a clever boy.(变为一般疑问句) _____ I am a clever boy.(变为否定句) _____ He isn't my good friend. Are you a clever boy _I am not a clever boy. 填空题 1.Here_____ a pencil on the desk. 2.Here_____ my books. 3.These _____ our crayons. 4.That _____ a cap. 5.Those _____ dogs. 6.This _____ our school. 7.There _____ an apple. 8.There_____ grapes in the fridge. ：用is/are填空 is are are is are is is are 1.Here is a pencil on the desk.(改成否定句) _____ 2.Here are my books.（改成否定句） _____ 3.These are our crayons.（改成一般疑问句） _____ 4.That is a cap.（改成一般疑问句） _____ 5.Those are Lily's dogs.（改成一般疑问句） _____ Here isn't a pencil on the desk. Here aren't my books. Are these your crayons Is that a cap Are those Lily's dogs 6.This is our school.（改成否定句） _____ 7.There is an apple.（改成否定句） _____ 8.There is some milk in the fridge.（改成一般疑问句） _____ This isn't our school. There isn't an apple. There isn't any milk in the fridge. 3.行为动词的变化 ① 当主语为第三人称单数时，谓语动词要变成相应的单数形式； My sister often goes to school by bus. Mary always watches TV at eight. 条件 变化方法 例词 一般情况下 直接加-s Likes, asks, begins 以ch, sh, s, x 或o结尾的词 加-es does ,teaches, washes, guesses, goes 以“辅音字母+y”结尾的词 变y为i,再加-es try-tries carry-carries fly-flies study-studies Her f ... ...
