using by

[black cat]

I want to ask do we always use ( by ) with all ways of transport.
I mean do we say i travel by ( boat, ship ,plane , helicopter and other way of transport)

 

[Anglika]

Not always.

You can also travel on a boat, in a train, on a plane, on a bicycle and so on.

To travel by something indicates the means by which you are travelling.

 

[Wuisi]

Hi,
But you always use 'by' if the means of transport is not modified in any way. 'by train' but 'on/in the last train'. 'by car' but ' on/in Peter's car'... and we say 'on foot (or walking) and 'on horseback', 'on camelback'...rather than 'by horse' or 'by camel'... (not a teacher)
Regards