英语语法题（虚拟语气）,求详解1.Tom might have come to Professer Smith's lecture but he got up rather late.(为什么填but he got up rather late,可以用if he had gotten up early么）

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英语语法题（虚拟语气）,求详解1.Tom might have come to Professer Smith's lecture but he got up rather late.(为什么填but he got up rather late,可以用if he had gotten up early么）
英语语法题（虚拟语气）,求详解
1.Tom might have come to Professer Smith's lecture but he got up rather late.(为什么填but he got up rather late,可以用if he had gotten up early么）

英语语法题（虚拟语气）,求详解1.Tom might have come to Professer Smith's lecture but he got up rather late.(为什么填but he got up rather late,可以用if he had gotten up early么）
当If 表虚拟语气时候,表示与过去事实相反：
If ...had done ...,...would(might,could) have done...
从句谓语动词用had+done,主句用should/would/could/might+have+done结构.
所以这个句子如果用if从句的话,应该是Tom might have come to school in time for the lecture if he had gotten up earlier.
might have done sth 表示本因该做某事而事实却没有做,也表示与现在事实相反.如果后面有but,则表转折,所以后面句子不用虚拟语气,而要用陈述语气,一般过去时.所以but he got up rather late也是对的.
这道题应该是个选择题,根本还是考察的虚拟语气,表示与过去事实相反：
If ...had done ...,...would(might,could) have done...
但备选答案上没有if的正确答案,所以选择了陈述语气.

一般情况系，if/when 后面不接完成时。上面的句子可以换成：Tom might have come to Professer Smith's lecture if he got up early.

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