We get on the train in Taipei.

我们在台北上火车。

Where do we get on the train?

我们到哪儿坐火车？

Where do I get on the train?

我在什么地方上火车？

Do you get on the train?

这样说对吗？：你上火车了吗？

The passengers can get on the train now.

旅客们现在可登上火车了。