tailieunhanh - OXFORD PRACTICE GRAMMAR 45

OXFORD PRACTICE GRAMMAR-45 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 45 PERMISSION CAN MAY COULD AND BE ALLOWED TO A Asking permission We use can could or may to ask for permission. Can I use your pen Could we borrow your ladder please Well I m using it at the moment. May I see the letter Certainly. Could often sounds more polite than can. May is rather formal. B Giving and refusing permission To give permission we use can or may but not could . You can wait in my office if you like. Could I borrow your calculator Of course you can. You may telephone from here a written notice May is formal and is not often used in speech. To refuse permission we use can t or may not but not couldn t . Could we picnic here I m sorry. I m afraid you can t. Members may not bring more than two guests into the club. We can also use must not. Luggage must not be left unattended. C Talking about permission We sometimes talk about rules made by someone else. To do this we use can could and be allowed to. We use can to talk about the present and we use could for the past. Present Each passenger can take one bag onto the plane. Past In the 1920s you could drive without taking a test. We can also use be allowed to. Present Passengers are allowed to take one bag onto the plane. Future Will I be allowed to record the interview on tape Past We weren t allowed to look round the factory yesterday. For a general permission in the past we use either could or was were allowed to. could always stay 1 was always allowed to stay up late as a child. But to say that the permission resulted in a particular action something that really happened we use was were allowed to but not could . I was allowed to leave work early yesterday. We were allowed to go into the control room when we looked around the power station. Compare these questions with may and be allowed to. ASKING FOR PERMISSION ASKING ABOUT PERMISSION May I take a photo of you Are we allowed to take photos Will you allow it What is the rule 45 EXERCISES 1 Asking permission A How would you .