tailieunhanh - OXFORD PRACTICE GRAMMAR 40

OXFORD PRACTICE GRAMMAR-40 sau đây là giáo trình lý thuyết tiếng anh và bài tập áp dụng từ cơ bản đến nâng cao , nhằm giúp các bạn có thể tự mình ôn tập và củng cố thêm về nền tảng kiến thức môn Anh văn , tự tin đạt kết quả tốt trong kỳ thi ngoại ngữ | OXFORD PRACTICE GRAMMAR 40 NEGATIVE STATEMENTS A Use Christopher Columbus Christopher Columbus was a famous explorer. At one time people believed that he had discovered America. We know now this isn t true. Columbus was not the first European to travel to the New World. We don t know who was but the Vikings had sailed there around the year 1000 and probably others before them. In 1492 Columbus sailed to San Salvador in the Bahamas and to other islands but he never reached the mainland of North America. He actually thought he was in Asia. He certainly didn t discover America. We often use a negative statement to correct a mistaken idea such as the idea that Christopher Columbus discovered America. B Negative verb forms POSITIVE NEGATIVE be are dancing are not dancing OR aren t have have seen have not seen OR dhaveni t seen Moda verb must stay must not stay OR mustn t stay In a negative statement not or n t comes after the auxiliary verb. The auxiliary verb is a form of be have or a modal verb . must can could. The girls are not dancing. The modem isn t working properly. I haven t seen the new Disney film. David hasn t got a car. 1 mustn t stay long. You can t turn right here. I m not feeling very awake today. We write n t without a space before it . isn t haven t. Not or n t also comes after the main verb be. The photos are not ready yet It isn t very warm in here. If there is more than one auxiliary verb we put not or n t after the first one. This plate hasn t been washed. You shouldn t have bothered. In the present simple and past simple we use a form of do. POSITIVE NEGATIVE Present simple work do not work OR don t work looks does not look OR doesn t look Past simple enjoyed did not enjoy OR didn t enjoy 1 don t work on Saturdays NOT I-work not on Saturdays. This part of town doesn t look very nice. I m afraid we didn t enjoy the day very much. The verb after not or n t does not end in s or ed. NOT It doesn t looks-very nice and NOT We-dtdn t-enjoyed the .