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九年级英语第二十一单元

[10-10 21:44:35]   来源:http://www.77xue.com  九年级英语教案   阅读:8678
概要:I was asleep from three to six . ( = for three hours ) 我从三点到六点在睡觉。 ( 我曾睡了三小时 ) ②当我们不说出动作或情况是什么时候结束时,也用 from 一词。如:We had to begin our work from six in the morning . from 也可用于地点。如:Where do you come from ? since ①只用于时间而不用于地点,意指“从那时起到说话的时刻。”它常常和现在完成时或过去完成时连用。如:What have you been doing since this morning ? It has been raining since two o\'clock . It was now six and he was tired because he had worked since dawn . 注意 since 与 from 的区别,I was there fro
九年级英语第二十一单元,标签:初三英语教案,新目标九年级英语教案,http://www.77xue.com

  I was asleep from three to six . ( = for three hours ) 我从三点到六点在睡

觉。 ( 我曾睡了三小时 )

  ②当我们不说出动作或情况是什么时候结束时,也用 from 一词。如:

  We had to begin our work from six in the morning .

  from 也可用于地点。如:

  Where do you come from ?

  since ①只用于时间而不用于地点,意指“从那时起到说话的时刻。”它常常和现在完成时或过去完成时连用。如:

  What have you been doing since this morning ?

  It has been raining since two o\'clock .

  It was now six and he was tired because he had worked since dawn .

  注意 since 与 from 的区别,

  I was there from three o\'clock , but nobody came . 我从三点钟起一直在那儿,但没有人来过。 ( 不能说……since three o\'clock )

  I \'ve been there since three o\'clock , but nobody\'s come yet . 我从三点钟起一直在那儿,但没有人来过。( 此句不能说 ……from three o\'clock )

  ②在“It is + 时间词语 + since”中,since 可以和现在时态或过去时连用。

  It\'s a long time since the last meeting .

  It was ages since my last meal , and I was very hungry .

  注意 since 与 for 的区别:

  当 for 和 since 都用在现在完成时句子中时,这两个词很容易搞混。记住:for 表示什么事情延续了多长时间。since 则表示这件事是从什么时候开始的。试比较:

  for three days since Tuesday

  during①用于已知的一段时间,即为大家所熟知的节日名称,如:Christmas ( 圣诞节 ) ,或者已经限定的时候或阶段。如:

  during the years 1980 — 1990 在1980年1990年期间

  ②行动可以持续整个时期或只发生在这个时期的某一时刻。如:

  It rained all Monday but stopped raining during the night . 星期一整天下雨,但夜里雨停了。 ( 在某一时刻 )

  He was ill for a week , and during that week he ate nothing .

  during 与 for 的区别:

  during 表示什么时间发生了什么事。for 表示这件事持续了多长时间。

  There was a storm during the night ; it rained for three or four hours . 夜里暴风雨大作,雨一直下了三四个小时。

  My father was in hospital for six weeks during the summer . 我父亲在夏天住了六个月医院。

  ago 不用来表示动作和情况的持续时间,也不用来表示动作是什么时候开始的。ago 只表示过去的事情是什么时候发生的。但我们用的是从现在往过去追溯的“倒数法”,而不说出具体日期。ago 要和过去时态连用。如:

  I saw him three days ago . 我三天前看见他的。 ( 从现在起倒数的三天 )

  I caught this cold two weeks ago .

  注意ago 是“自今…之前”,before 是“自过去…之前。”

  25 . either … or 与 neither … nor 和 both … and 的区分

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