新概念英语二册55课第二句话中为什么要用现在完成时呢?
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新概念英语二册55课第二句话中为什么要用现在完成时呢?
A new machine called‘The Revealer’has been invented and it has been used to detect gold which has been buried in the ground.
还有The pirates would often bury gold in the cave and then fail to collect it. 中fail为什么不是过去式呢
A new machine called‘The Revealer’has been invented and it has been used to detect gold which has been buried in the ground如果这里用过去式行不行为什么要用完成时?
A new machine called‘The Revealer’has been invented and it has been used to detect gold which has been buried in the ground.
还有The pirates would often bury gold in the cave and then fail to collect it. 中fail为什么不是过去式呢
A new machine called‘The Revealer’has been invented and it has been used to detect gold which has been buried in the ground如果这里用过去式行不行为什么要用完成时?
首先讲一下现在完成时的三种用法:
1.表示已完成的动作;2.表示未完成的动作或状态,可能继续下去,也可能刚刚结束;3.表示从过去到现在期间反复发生的动作或多次出现的状态.
第一句.A new machine called‘The Revealer’has been invented and it has been used to detect gold which has been buried in the ground.
a.本句中invent处属于用法1;use处属于用法3;bury处属于用法2.
b.3个has been的原理即是平行结构,又符合一种写作技巧repetition(重复).
第二句:The pirates would often bury gold in the cave and then fail to collect it.
因为过去时已经在would上体现了.bury and fail是一个并列的结构,要求两者形式一致.把此句展开的话可以理解为:
...would bury and would fail...
第三句:A new machine called‘The Revealer’has been invented and it has been used to detect gold which has been buried in the ground.
用完成时的原因已经在第一句中说了.
invent处其实也可以用过去式表达,而后两处用过去式显然表达不出"从过去到现在"一直处于的状态,会造成语意混乱现象.(美语中有用过去式替代现完的趋势,但仅限于口语,书面中很少见.)
因为后两个都用现完,所以invent也用现完,平行结构.
1.表示已完成的动作;2.表示未完成的动作或状态,可能继续下去,也可能刚刚结束;3.表示从过去到现在期间反复发生的动作或多次出现的状态.
第一句.A new machine called‘The Revealer’has been invented and it has been used to detect gold which has been buried in the ground.
a.本句中invent处属于用法1;use处属于用法3;bury处属于用法2.
b.3个has been的原理即是平行结构,又符合一种写作技巧repetition(重复).
第二句:The pirates would often bury gold in the cave and then fail to collect it.
因为过去时已经在would上体现了.bury and fail是一个并列的结构,要求两者形式一致.把此句展开的话可以理解为:
...would bury and would fail...
第三句:A new machine called‘The Revealer’has been invented and it has been used to detect gold which has been buried in the ground.
用完成时的原因已经在第一句中说了.
invent处其实也可以用过去式表达,而后两处用过去式显然表达不出"从过去到现在"一直处于的状态,会造成语意混乱现象.(美语中有用过去式替代现完的趋势,但仅限于口语,书面中很少见.)
因为后两个都用现完,所以invent也用现完,平行结构.
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