I go to the park
he is doing homework
she keeps fit
they are taking photos
【希望能帮助你,希望能采纳】每一题都造三个时态麻烦全写了谢谢了好的1.I go to the park .I wentto the park .I am going to the park 2.he does homework he did homework he is doing homework3.she keeps fit she kept fitshe is keepingfit4they take photos they took photosthey are taking photos 【希望能帮助你，希望能采纳】