是by the train 还是take the train?

问题描述:

是by the train 还是take the train?
还有,是by the plane还是take the plane?

by后接交通工具都不能加the,直接接交通工具 如 I go to school by bus/train/car.
take后接交通工具特指时可加the,不特指时可加a.如I'll take a train to *.或说,He took the train to Italy.