The students _that our class will visit a water treatment factory this afternoon.A.knew B.are knowing C.will known D.have known（答案选D,为什么不选A?) 要具体分析哦（The students _that our class）作主语，knew表示一个

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The students _____that our class will visit a water treatment factory this afternoon.A.knew B.are knowing C.will known D.have known（答案选D,为什么不选A?) 要具体分析哦（The students _____that our class）作主语，knew表示一个
The students _____that our class will visit a water treatment factory this afternoon.
A.knew B.are knowing C.will known D.have known
（答案选D,为什么不选A?) 要具体分析哦
（The students _____that our class）作主语，knew表示一个状态去修饰The students，可以这样理解吗？

The students _____that our class will visit a water treatment factory this afternoon.A.knew B.are knowing C.will known D.have known（答案选D,为什么不选A?) 要具体分析哦（The students _____that our class）作主语，knew表示一个
时态问题,that引导的宾语从句中用的是will,是一般将来时,所以由选项知道A和D,只能选D.要想选A,则从句应将will改成would.

因为说这句话的时候表示之前的事情对现在有影响。
所以用have known.其实我觉得语法没有那么多为什么，习惯就是了。呵呵。

选A的话是一般过去时态，这样后边的从句中will也应该是would才对，所以排除
而根据句意，从句中这件事显然是已经知道的，所以选择D为现在完成时态，也与从句无冲突

现在完成时。
已经知道将来要做的一个动作。

这是一个时态问题，that引导的宾语从句中用的是will，是一般将来时，而不是过去式，所以只能选D.要想选A，则从句应将will改成would.

D
students知道的对现在有影响

The great man died twenty years ago.同义句转换 It ______twenty years _____th the students()()()the teacher most students most of students most of the students都对么?all students all the students？all of the students？ What are the students What are the students Where the students是什么意思 the students'life today Are the students happy? The number of students the students is /are The students aren Give the students lessons. The students' parents died. the student、students the students 的区别应该是students、the students student ,the student, students the students 的区别 the student,the students,a student,students的区别 all the students 还是all of the students The students are relaxing.对relaxing提问------ ------the students ------?