To finish / To complete

Used to express the completion of a task thoroughly.

To do something together / Mutually

Used when multiple people perform an action together (mutually).

I wish I had... / I should have...

Expresses regret about something not done in the past.

The more... the more...

Expresses proportional change: as one aspect increases, the other also increases.

If only... / I wish...

Expresses regret about a reality that did not happen as expected.

Only / Nothing but / Always

Used to complain about an action or thing being repeated too much.

Not only... but also...

Indicates escalation: not only A but even B also...

Not particularly / Not really

Used to negate gently, or express indifference.

For the first time in... / After...

Expresses doing an action again after a long time of not doing it.

Ended up doing / Accidentally did / Completed

Expresses completion, or regret about accidentally doing something undesirable.