英语时态精讲之一般现在时

1、含有be动词的句子He is a teacher.The girl is very beautiful.Tim and Jack are students.★变疑问句将be动词移到句首Is he a teacher?Is the girl very beautiful?Are Tim and Jack students?★变否定句在be动词后面加notHe is not a teacher.The girl is not very beautiful.Tim and Jack are not students.★肯定回答及否定回答Yes, he is. / No, he is not.Yes, she is. / No, she is not.Yes, they are. / No, they are no2、不含有be动词的句子,即含有一般动词的句子。(1)第三人称单数及单数名词He likes books.She likes him.The dog likes bones.★变疑问句在句首加does, 动词变为原型Does he like books?Does she like him?Does the dog like bones?★变否定句在主语及动词之间加doesn't, 动词变为原型,原句中的动词不再有第三人称变化。He doesn't like books.She doesn't like him.The dog doesn't like bones.★肯定回答及否定回答:Yes, he does. / No, he doesn't.Yes, she does. / No, she doesn'tYes, it does. / No, it doesn't.注意:第三人称单数形式一般在动词后面加S,不要和名词复数混淆,变否定句或疑问句时名词复数没有任何变化。(2)其他人称及复数名词I want to have a bath.We have some meat.The students like smart teachers.★变疑问句在句首加doDo you want to have a bath?Do we have any meat?Do the students like smart teachers?★变否定句在主语和动词之间加don't.You don't want to have a bath.We don't have any meat.The students don't like smart teachers.★肯定回答及否定回答Yes, I do. / No, I don't.Yes, we do. / No, we don'tYes, they do. / No, they don't.