Tham khảo tài liệu 'kaplan toefl ibt fourth edition part 49', ngoại ngữ, toefl - ielts - toeic phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | 328 I TOEFL 8T Errors Corrections 1. Planting trees is a good idea because trees ace producing oxygen. 2. Students should krays work hard because universities are accepting the brs-t students. 3. Ootids are ferm g portly from evaporated water. 4. Volcanoes are shooting m a into the air when the erupt 1. Ptanting trees is a good idea because trees produce oxygen. 2. Students should always work hard because universities accept the best students. 3. Ckxids form partly from evaporated water. 4. totanoes shoot lava into the air when they erupt Strategy 16 D Ensure that the past simple has a known specified. or implied time. Students often misuse the past simple. Use the past simple when you specify a particular time in the past with a time. date prepositional phrase such as m Jugfc Jthoof. or clause such as whew f w nw tg. Also you can continue io use the past simple or continuous in a paragraph once you specify the time period. After j time has been mentioned it becomes known or assumed and doesn t have to be repeated so you don t have to keep repeating the same date. Moreover a specific time is unnecessary if the time is implied or assumed based on the vocabulary which is common in history The veterans of Av d War i returned many physical and emotional scars AW is a known period from 1914-1918 The fest clones of the United States were founded by settiers from England and other European couocnes. The country and verb refer to a specie known period of history -the carty 7th Century On he other hand when you want to refer IO the general unspecified or unknown post use the present perfect. Among its many uses the present perfect refers to past experience which is a past action or state at an unknown or unspecified time. Errors Corrections 1 I d peter to live in the mountains because 1 never ived there. studied many instruments but my favorfe is die trombone. 1. rd prefer to fcve h the mountains because 1 never Irved there when was young. I d prefer to live in the
