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    表示时间的介词 1)in , on.at 在--时 in表示较长时间.如世纪.朝代.时代.年.季节.月及一般的早.中.晚等. 如 in the 20th century, in the 1950s, in 1989, in summer, in January, in the morning, in the night, in one’s life , in one’s thirties等. on表示具体某一天及其早.中.晚. 如on May 1st, on Monday, on New Year’s Day, on a cold night in January, on a fine morning, on Sunday afternoon等. at表示某一时刻或较短暂的时间.或泛指圣诞节.复活节等. 如at 3:20, at this time of year, at the beginning of, at the end of -, at the age of -, at Christmas. at night, at noon, at this moment等. 注意:在last, next, this, that, some, every 等词之前一律不用介词.如:We meet every day. 2)in, after 在--之后 “in +段时间 表示将来的一段时间以后, “after+段时间 表示过去的一段时间以后, “after+将来点时间 表示将来的某一时刻以后. My mother will come back in three or four days. He arrived after five months. She will appear after five o’clock this afternoon. 3)from, since 自从-- from仅说明什么时候开始.不说明某动作或情况持续多久, since表示某动作或情况持续至说话时刻.通常与完成时连用. He studied the piano from the age of three. They have lived here since 1978. 4)after, behind 在--之后 after主要用于表示时间, behind主要用于表示位置. We shall leave after lunch. Lucy is hiding behind an old house. 【查看更多】

     

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    书面表达。
         假设你叫严志胜，你的老同学吴琛半年前去加拿大留学，你们常通过e-mail互通情况，最近他来信
    介绍他在那里的情况，并询问你和你们班的同学们。请你根据以下他的来信以及上述介绍，写一封
    100词左右的回复邮件。
    Hi, Yan Zhisheng,
         I have just spent my term l in this semester at Unionville High School. I have to say this is a great
    school. I have joined the Math Club of the school and taken part in some math competitions. This is good
    for me to apply for the University of Waterloo, which is my dream school.
         By the way, I've got my mid-term scores. I have 4 courses, and the scores are 94, 91, 84 and 79. I am
    not satisfied with my score in ESLD course, so I will try my best to work harder in term 2.
         How are you getting along? How is Class 0806? Please write back.
         I sincerely wish you the best of luck in everything!
                                                                                                                                             Wu Chen
    要点：1．对他在如此短时间取得的成绩表示祝贺；
              2．表达你对他ESLD课程成绩提高的信心；
              3．简要介绍自己和全班的情况。
    注意：1．可以适当发挥，不要简单翻译； 
              2．词数100左右。开头和结尾已经写好，不计入总词数。
    Hi, Wu Chen,
         Nice to read your e-mail today. Congratulations on your good mid-term scores! You've been in Canada
    ______________________________________________________________________________________
    ______________________________________________________________________________________
         Best wishes!
                                                                                                                                       Yan Zhisheng

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