Two persons are in a scene.A said"why didnot you meet me at the station?" B said"I was busy in completing my work.I know you would understand. Then he tell about his work.I don't know why B used would instead of will,although there is no condition here.please hep me out in this .
2 Answers
There are some problems with the sentences you are looking at. They should say:
A said "Why did you not meet me at the station?"
B said "I was busy completing my work. I knew you would understand."
The reason B uses 'would' here is because they are speaking about themselves in the past imagining this future hypothetical situation - "I knew (at the time) you would understand (in the future from that time)".
If B was speaking to A on the phone while A was at the station, B would say "I know you will understand" because the situation is actually happening now rather than maybe happening in the future.
B could still say "I know you will understand" now, but it doesn't sound quite right to a native speaker.
the verb would is the past tense of will (and also used as a conditional, but not here):
A said:
"why didnot you meet me at the station?"
Correction: Why didn't you meet me at the station.
B said: "I was busy in completing my work. I know you would understand.
Correction: I was busy finishing my work. I knew you would understand.
Here is the rule:
In the present time: I know you will understand why I cannot come to dinner at your house.
Referring to the past: I knew you would understand why I could not come to dinner at your house.
In short, the past tense of will is would. would is not just used in conditional sentences such as:
I would come if I could.