OXFORD PRACTICE GRAMMAR-120 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 120 FOR SINCE AGO AND BEFORE FOR SINCE AGO Mark has spent three hours It was two o clock when Mark Three hours have passed since playing a computer game. started the game. He s been Mark and Sarah got up from He s been sitting there for playing since two o clock. the lunch table. They finished three hours. their lunch three hours ago. B For and since with the present perfect We often use for and since with the present perfect to talk about something continuing up to the present. FOR SINCE We use for to say how long something has We use since to say when something began continued. I ve been waiting for forty minutes. I ve been waiting since ten past six. We ve known about it for two days. We ve known about it since Monday. Melanie has been living here for a year now. Melanie has been living here since last year. We can also use for with other tenses. I m staying in England for a year. We swam for quite a long time. We can often leave out for but not from some negative sentences . We ve had this car for six months. I haven t seen Vicky for a day or two. C Ago with the past We can use the adverb ago to talk about a past time measured from the present. Six months ago means six months before now. I passed my driving test six months ago. NOT since six months Vicky wrote to the company weeks ago. David first met Melanie a long time ago. Have you seen Emma Yes just a few minutes ago. We put ago after the phrase of time NOT ago-six months D Before with the past perfect We use before not ago with the past perfect . had done. I bought a car in August. I d passed my driving test three months before. in May three months before August Vicky finally received a reply to the letter she had written weeks before. 120 EXERCISES 1 For and since A-B Put in for or since. Daniel How long have you been learning English Ilona Well I studied it - for five years at school and I ve been having evening classes 1 .last summer. That s when I left school. Daniel And you
