1 The stident was running to move the bag of rice ( )he heard th sound of a bike.2 What was your father doing ()your mother was cooking in the kitchen.第一题为什么用when不用while.第二题为什么用while 不用when?
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1 The stident was running to move the bag of rice ( )he heard th sound of a bike.2 What was your father doing ()your mother was cooking in the kitchen.第一题为什么用when不用while.第二题为什么用while 不用when?
1 The stident was running to move the bag of rice ( )he heard th sound of a bike.
2 What was your father doing ()your mother was cooking in the kitchen.第一题为什么用when不用while.第二题为什么用while 不用when?
1 The stident was running to move the bag of rice ( )he heard th sound of a bike.2 What was your father doing ()your mother was cooking in the kitchen.第一题为什么用when不用while.第二题为什么用while 不用when?
while后面一定是进行时,when是过去式,我们老师是这么讲的.
当句子中一个是进行时,一个是一般过去时,用when
当句子中两个都是进行时,用while
第一题heard是瞬间动词,非延续,不能用while,第二题cooking是延续的动作,可用while可用when