Elizabeth said:
Thanks for the reality check.
In textbook Japanese/English this would probably be translated "I saw the man just as he was sitting down." so I suppose I still don't get the difference with わっている人 and わっているところの人
One thing to note about ~しているところ: it cannot be placed in front of the noun like adjective.
We can say
その人はすわっているところです。 (which could mean either the person is sitting or just sitting down)
but we cannot say
すわっているところの人
It does not sound natural as Japanese.
You can say
すわっている人 (the person who is sitting/who has been sitting - the action of sitting down is completed and as a result he is sitting.)
すわろうとしている人 (the person who is now in process of sitting down, or who is about to sit down - the action has not completed yet)
Sorry I do not know grammatical terms to explain the difference properly... I hope it makes sense.
Elizabeth said:
And finally (or perhaps not) which of these is most natural for describing a future action like this "I will be in Tokyo for two weeks" ? Of course there are others, but to just for now to keep the discussion focused on momentary/Group 3 verbs.
[2週間東京に行っている」、「2週間東京に行って来 る]
Basically, as far as the verb いる is used, it cannot mean the future.
I'm not sure what is the closest word in English, maybe "being"?
It suggests someone/something is (already) in a certain state.
Therefore it can mean (1) the action is in progress right now (2) the action was already completed.
I think that when talking about yourself, it can be rather confusing.
(I vaguely remember that Japanese language does not really have tense but use aspect instead....)
I'm not confident if I can clarify the difference between these two sentences, but I'll try.
2週間東京に行っている
This can be talking about the future event/situation, but the future of the action 東京に行く itself.
I'll go to Tokyo for two weeks, and during that period (after the action of "going to Tokyo" is completed) I will be in Tokyo (and will not be here).
When I'm saying this (= 2週間東京に行っている),
my mind is already in the future situation I will be* after going to Tokyo. I'm looking at the action as something already happened.
*If the time is a kind of line and we see it like shooting a flim - in English we see the "time" from one fixed point, just like shooting a film with one camera which is fixed on one point.
In Japanese, we see it from various points - like shooting a film with many cameras placed in several places.
2週間東京に行ってくる
This sentence implies that I'm going to Tokyo and stay there for two weeks, and I intend to come back.
The action of "going to Tokyo" has not happened yet.