什么来到什么倒什么什么因倒什么因成语

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It must have rained last night，____ the ground is wet this morn-ing．
A．because B．for
此题答案选 for 。既然 for 和 because 均表示原因和理由，是否可互换？如何辨别其含义及用法呢？大家不妨用“倒果为因”法来辨别。
所谓“倒果为因”，就是把结果说成原因。在意义上，because总是表示因果关系，而 for 只是有时表示因果关系。换句话说，be-cause 只能表示原因，而 for 则有时表示原因，有时表示结果。如：
They missed the first train，for they got up very late． ( 原因 )
It is morning now，for the birds are singing． ( 结果 )
当 for 表示原因时，可与 because 替换，只是 for 引导的是并列分句，且只能置于句末，其前加逗号；而 because 引导的是状语从句，其位置可前可后。
当 for 表示结果时一定不能用 because 替换，如文首之句就不能说成：It must have rained last night because the ground is wet thismorning．因为地湿并不是下雨的直接原因，也有可能是其它原故。相反，地湿却可以说成是下雨的必然结果。象这种把结果说成原因的“倒因为果”的说法只能用 for，不用 because 。再如：
It is going to rain，for barometer ( 气压 ) is falling．
The day breaks，for the sun is rising．
Exercise：
请用上述方法辨别下列各题该用 for 还是 because 。
1．He could not have seen me，____ I was not there．
2．Shewasnothappy____shehadn'tenoughmoneyforaTVset．
3．It must be morning now，____ the birds are singing．
4．It was not daylight，____ the candle was burning．
5．The Emperor felt sorry ____ he knew that the people wereright．
【什么来到什么倒什么什么因倒什么因成语】6．The whole nation was in deep sorrow at this news，____ thepeople had come to love him as an inspiring leader．
7．We must start early ____ we have a long way to go．
8．It must have rained much recently．____the river is so high．
Key：1，3，4，6，8．for 2，5，7．because

什么来到什么 倒什么什么因 倒什么因成语

什么来到什么倒什么什么因倒什么因成语