Question

4) The train
(leave) by the time when we reach the station.​

Answer 1

Answer:

The correct sentence should be, When I reached the station, the train had left. According to the rules of 'tenses' , when there are two past actions, the first past action should take past perfect tense , and the second past action should take sinple past.

Explanation:

I hope it helps you.....

Answer 2

The train had left by the time when we reached the station.​

Explanation:

• The train had left by the time when we reached the station.​
• This is the correct sentence.
• It is a two clause sentence.  
• If the first clause of the sentence is in past perfect tense then the second clause will b in the simple past tense.
• Take this, for example, My cake had burnt completely when I switched off the microwave.