Read each pattern and its example, then write your own sentence on the line.
〜たる（者） N＋たる＋N（＝である）；多く「〜たる者」
Formal written equivalent of である: 'someone in the position of X'. Used to state the duties or conduct expected of that role, often with should/must.
教師たる者、常に学び続けねばならない。 A teacher must never stop learning.
〜つ〜つ V-ますstem＋つ＋（対・受身の）V-ますstem＋つ
Pairs two opposite or paired verbs to show two actions repeating alternately. A literary, set-phrase pattern: 行きつ戻りつ, 抜きつ抜かれつ, 押しつ押されつ.
二人は抜きつ抜かれつのレースを続けた。 The two kept up a race in which they passed each other again and again.
〜であれ / 〜であろうと N／疑問詞＋であれ／であろうと（な-adj語幹も可）
'No matter what/who it is' — concedes any case, often after a question word or たとえ. Formal, common in written rules and speeches.
どんな理由であれ、暴力は許されない。 Whatever the reason, violence is not acceptable.
〜であれ〜であれ N1＋であれ＋N2＋であれ
Lists two (or more) contrasting nouns to say 'whether A or B, the same applies'. Formal and written; the second clause states what holds in every case.
晴れであれ雨であれ、試合は必ず行われる。 Rain or shine, the match will definitely be held.
〜てからというもの V-te＋からというもの（（は））
'Ever since X, things have been different' — marks a turning point after which a lasting change continues. More emphatic and slightly formal than 〜てから.
引っ越してからというもの、外食が増えた。 Ever since I moved, I've been eating out more.
〜でなくてなんだろう N＋でなくてなんだろう（か）
A rhetorical question: 'if this isn't X, what is?' The speaker asserts strongly that it can only be X. Emotional and literary, used in essays and commentary.
これが愛でなくてなんだろう。 If this isn't love, what is?