My father often ----(swim)in that river ai the age of five.

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Myfatheroften----(swim)inthatriveraitheageoffive.Myfatheroften----(swim)inthatriveraitheageoffive.My

My father often ----(swim)in that river ai the age of five.
My father often ----(swim)in that river ai the age of five.

My father often ----(swim)in that river ai the age of five.
应该是swam,因为是5岁时候经常发生的事.

at the age of five 在他5岁的时候,所以用过去式,swim的过去式是swam
正确答案swam
望采纳 啊啊啊

我爸爸经常在那条河里游泳

原型 often是频度副词