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一道高中英语单项选择题?

It was aout 600 years ago ()the first clock with a face and an hour hand was made.

答案给的是that 为什么不能用when
或者说什么时候用when 什么时候用that

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It was aout 600 years ago ()the first clock with a face and an hour hand was made.

答案给的是that 为什么不能用when
或者说什么时候用when 什么时候用that
试从高中语法角度诠释

全部答案(共1个回答)

  • it is...that 是强调句 强调句的特点是:把it is 和that去掉能还原成一个完整的句子。这个句子把it was 和that去掉可写成:The first clock with a face and an hour hand was made about 6oo years ago.因此这句话是强调句 故用that。 在高中英语中和强调句易混,但用when的句型是:it is  时间...

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    it is...that 是强调句 强调句的特点是:把it is 和that去掉能还原成一个完整的句子。这个句子把it was 和that去掉可写成:The first clock with a face and an hour hand was made about 6oo years ago.因此这句话是强调句 故用that。 在高中英语中和强调句易混,但用when的句型是:it is  时间点 when从句.在这个句型中it表示时间 作主语,when(当...时)引导时间状语从句。如:以下三题 都用when
    [1]It is about 9:30 pm ______ he comes back home after three evening
    classes . (2005崇文二模)
    A. when B. before C. that D. since
    [2]It was twelve o’clock at midnight _____ they arrived at a lonely

    village
    A. that B. before C. since D. when (2004石家庄二摸)
    [3]---Did Jack come back early last

    night ?
    ---Yes .It was not yet eight o’clock _______ he arrived home .
    A. before B. when C. that D. until (2005广东卷)
    在以上三题中 不能把it is和when去掉。

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