she is airing the room now 变成过去式she is airing the room now 变为过去式 she aired it yesterday 为什么没有加was

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sheisairingtheroomnow变成过去式sheisairingtheroomnow变为过去式sheairedityesterday为什么没有加wassheisairingtheroomno

she is airing the room now 变成过去式she is airing the room now 变为过去式 she aired it yesterday 为什么没有加was
she is airing the room now 变成过去式
she is airing the room now 变为过去式 she aired it yesterday 为什么没有加was

she is airing the room now 变成过去式she is airing the room now 变为过去式 she aired it yesterday 为什么没有加was
she is airing the room now 变为过去式
she was airing the room yesterday
she aired it yesterday 为什么没有加wa
因为过去式是在动词上面改,air 已经是动词了,过去式是aired,已经有了动词,就不能再加be 动词了