when he went through the forest ,suddenly a tiger ____(出现) before me.用不用动词ing

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when he went through the forest ,suddenly a tiger ____(出现) before me.用不用动词ing
when he went through the forest ,suddenly a tiger ____(出现) before me.用不用动词ing

when he went through the forest ,suddenly a tiger ____(出现) before me.用不用动词ing
直接用动词的过去式就ok了
appeared
不明白的再问,多谢!

不用的,when是连词,连接两句,每句都有自己独立的主语和动词