Does てから any retain "subjective reason for action" meaning from から?


**My understanding of how から, ので, and て differ from each other when linking
clauses:**

  * から links a subjective reason for someone's action
  * ので links an objective reason for someone's action
  * て can indicate natural cause and effect relationships (in a sense, it shows causality that's even more "objective" than ので).

But what about てから? Supposedly, てから disambiguates actions which could be
performed simultaneously or in sequence in て-sentences:

> 歯を **磨いて** テレビを見た。
>
> I brushed my teeth and watched TV. (Ambiguous whether this happened in
> sequence or at the same time).

> 歯を **磨いてから** テレビを見た。
>
> _After_ brushing my teeth, I watched TV. (てから forces the interpretation to
> be sequential).

But in this last example, does てから retain any of that "subjective reason for
action" quality, like から does? For example, is the speaker here implying that
finishing brushing his teeth played some subjective motivational role in
making him want to watch TV?

If so, does てので exist as a way to show a sequence of actions in which the
former acts as an "objective" reason for the latter action?




No, it doesn’t, just like ８時からテレビを見た has no subjective sense.

〜ので is the conjunctive form of 〜んです, which is actually a contracted form of
〜のです. It connects to a plain form, not a て-form. (〜てんで would be an informal
contracted form of 〜ているので. It’s a different thing.)




No, it doesn’t, just like ８時からテレビを見た has no subjective sense.

〜ので is the conjunctive form of 〜んです, which is actually a contracted form of
〜のです. It connects to a plain form, not a て-form. (〜てんで would be an informal
contracted form of 〜ているので. It’s a different thing.)

