How do you change the following sentence to the past tense?: The train is reaching its destination.
The train reached its destination.
The sentence given is in Present continuous, so, perhaps the best answer is:
The train was reaching its destination.
We could also use
The train had reached its destination.
Past perfect continuous:
The train had been reaching its destination.
I'm not sure where the sentence:
The train has reached its destination
fits into this system.