sen jälkeen kun

The structure sen jälkeen kun is the standard way to express 'after' when followed by a full clause (subject and verb). It consists of the genitive form of 'se' (sen), the postposition 'jälkeen' (after), and the conjunction 'kun' (when).

1. Clause vs. Noun:
It is important to distinguish between using a noun or a verb:

• Use 'jälkeen' with a noun: ruuan jälkeen (after the meal).
• Use sen jälkeen kun with a clause: sen jälkeen kun söimme (after we ate).

2. Tense Usage & Comparison:
To emphasize that the first action was fully completed, Finnish often uses the perfect tense or pluperfect tense in the 'after' clause: Sen jälkeen kun olen syönyt, menen ulos. (After I have eaten, I will go out.) Note the difference from sitten kun: sitten kun often means 'once/when', while sen jälkeen kun explicitly marks the later event as following the earlier one. Both can describe past or future situations.

3. Word Order:
Finnish does not use V2 (verb-second) inversion after a subordinate clause. The main clause retains its normal word order: Sen jälkeen kun söimme, me menimme ulos The alternative menimme me ulos is marked emphasis, not required inversion.

4. Punctuation:
When the subordinate clause comes first, place a comma at its end: Sen jälkeen kun söimme, menimme ulos. An additional comma inside the conjunction remains optional: Sen jälkeen, kun söimme, menimme ulos. However, if the clause follows the main clause, there are three specific correct choices: omitting the comma entirely, placing it before 'sen', or placing it between 'jälkeen' and 'kun'.

5. Register and Variations:
In spoken Finnish, kun is often shortened to ku, and sen is often pronounced se, resulting in the spoken equivalent se jälkee ku or sen jälkee ku. In formal writing, this phrase is often replaced by the temporal construction, which uses the partitive of the past passive participle (-tua / -tyä or -ttua / -ttyä depending on the verb type) plus a possessive suffix that matches the subject (e.g., syötyäni, syötyäsi). Additionally, if the subject of the 'after' clause is different from the main clause, it must be in the genitive case. If this different subject is a noun, no possessive suffix is added to the participle (e.g., Pekan syötyä). However, if the different subject is a personal pronoun, the participle takes a possessive suffix (e.g., hänen syötyään).

The earlier-action temporal construction presents its event as preceding the main event: Syötyäni lähdin corresponds to Sen jälkeen kun olin syönyt, lähdin. It expresses relative time, not an absolute past tense: Syötyäni lähden can refer to the future. First- and second-person actors can be identified by their suffix alone even when the main-clause actor differs. A third-person different actor uses the explicit pronoun, as in hänen syötyään. Demonstrative and indefinite pronouns do not add a possessive suffix: kaikkien syötyä (after everyone had eaten).