いつしか => before one knows N2
Accept, agree
~みこみがたつ => have a good prospect N1
Expected
つきましては => about; concerning; regarding N2
Cause, reason
いつかの ... => Previously N4
Time
しまつだ => Denotes negative results A N1
Reason, Result, Response
ことだし => Because...so... N2
Cause, reason
~且つ(かつ) => and N1
Line up, list
いつも => always; usually; habitually N5
~つい      => accidentally; unintentionally; by mistake N3
Regret
~たいしたことはない => trivial,not amounting to much N1
Emphasize the negative meaning
ことにする/ことにしている => to decide on/have a habit N3
~としたことが => ~ surprised N1
Surprised