Jack has a camera in his hand.(换一种句型,意思不变)

There is a camera in Jack's hand。 再问： We can't swim in the river in summer 。(现在进行时) 怎么做？ 再答： 现在进行时？有点难度。。。 We are not allowed to swim in the river in summer。难道是这样？再问： 不知道，我管他呢？我就这样写？