She is very tired because of_(work)the whole night.

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She is very tired because of_(work)the whole night.

She is very tired because of_(work)the whole night.
She is very tired because of_(work)the whole night.

She is very tired because of_(work)the whole night.
语感问题.working.
反正现在学得也就动原-过去式-过去分词,进行时
你一个个代进去也看得出是哪个形式.

working
because of 后面加介词短语

working