Is there a difference between:
1 He left his work early so that he arrived in time at the party.
2 He left his work early so that he would arrive in time at the party.
I gather that 2 means that it was his plan to arrive at the party in time but the sentence doesn't say if he really did so.
What about 1? Does that mean the same as 2 or does that mean that result e.g. that he indeed arrived at the party in time?
I think it's not so ambiguous in the present, though.
3 I teach him English so that he speaks it as well as possible. (purpose) I think result is impossible. Or possible?
What do you think about 2 and my take on it?