这是个将结构反过来的句子.本来应该是：I can see you at what time?我能在什么时间见下你?
现在将At what time拿到前面来,意思不变,但是句子更顺了：At what time can I see you? 在什么时间我能见下你?
这是典型的将条件句放在主句前面.
更多例子：
He couldn't move at that moment.他当时就不能动了.
At that moment he couldn't move. 当时他就不能动了.
I won't ever treat you bad. 我永远不会亏待你的.
Treat you bad is what I won't ever do. 亏待你是我永远不会做的事.