1. ～に足る（たる）
Verbal noun N する + に足る
Explanation: Indicates that something has enough value or qualification to deserve a certain evaluation or action. The negative ～に足らない means 'not worth...'. The fixed phrase 取るに足らない means something trivial and not worth worrying about or discussing.
2. ～に耐える / ～に耐えない
Verbal noun N する + に耐える / に耐えない
Explanation: Indicates whether something is worthy of evaluation or appreciation. In the negative ～に耐えない / ～に堪えない, it means something is so awful or cruel that one cannot bear to keep watching or listening. It is mainly used with a limited set of words such as 見る, 聞く, 鑑賞 and 批判.
3. ～といったらない / ～といったらありはしない
な-adjective だ + といったらない
Explanation: Emphasizes an extreme degree that words cannot fully describe. In speech, ない may sometimes be omitted, leaving ～といったら.... Adjectives are also often nominalized with さ, as in 寂しさ or すばらしさ.
4. ～かぎりだ
Explanation: Expresses the speaker's present emotion at its highest degree. It is generally used with emotional words such as うれしい, 寂しい, うらやましい, 残念 and 感激.
5. ～極まる / ～極まりない
な-adjective (+ なこと) / い-adjective (+ こと) + 極まりない
Explanation: Indicates that a state has reached an extreme. It is often used to evaluate undesirable attitudes or situations, as in 失礼極まりない. An important positive exception is 感極まる, meaning to become deeply moved or overwhelmed with emotion.
6. ～とは
* な-adjective / Noun N (だ may be omitted)
Explanation: Emphasizes surprise, admiration, or shock at a fact that exceeds expectations. The following clause normally expresses the speaker's reaction, but it may be omitted for effect. According to this lesson, it is not used to speak about oneself.
