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Tham khảo tài liệu 'english_rules_practice_3_split_14', ngoại ngữ, ngữ pháp tiếng anh phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | 4-1 Since for ago first last. Simpo PDF Merge and Split Unregistered Version - http www.simpopdf.com Since is followed by a time e.g. 6 o clock yesterday a year or date e.g. 1945 or an event e.g. the end of the war There hasn t been a world war since 1945. Things have changed a lot since the end of the war. We use since to talk about a period from that time in the past to now past 1945 1965 1985 since 1945 Note that we use since with the Present Perfect e.g. have changed . But a verb after since is about an event and it must be in the Past Simple Things have changed a lot since the war ended. 2 We use for with a period of time e.g. 6 years to answer the question How long A How long did the war continue B The war continued for 6 years. past 1 2 3 4 5 6 j I for 6 years The verb in the example is Past Simple continued but we can use for with other tenses to talk about a period of time in the now present the past or the future A How long is Mary staying B She s staying for five days. past now future 1 2 3 4 5 for five days There hasn t been a world war for many years. It will probably snow for several hours. 3 If we talk about the start and end of a period we use from not since and to The war lasted from 1939 to 1945. 4 We can use ago with a Past Simple verb to say when something happened A When did the Second World War start B It started over 50years ago. It started 50 years back in the past from now. 5 Look at these sentences where first means for the first time and last means for the last time Jane and Bill first met 10 years ago. The planet Pluto was first seen in 1940. A When did you last visit Scotland B I last visited Scotland two years ago. Practice A Put in when how long ago since for or from in the gaps. 0 When did you leave the office 1 My mother died five years 2 I was at university 1989 to 1993. 3 They ve worked here about five years. 4 We ve lived here 1989. 5 did you start your present j ob 6 have you had your present job B Put the verbs in brackets in .
