1. ～なり…なり
Explanation: Gives two representative alternatives of the same type, with the sense “A or B or something like that,” leaving the listener to choose an appropriate option; other alternatives may also exist. It is often used for advice, suggestions, requests, or urging someone to act. Consequently, the following clause is typically non-past, rather than this being an absolute rule that the past tense can never occur.
2. ～であれ…であれ / ～であろうと…であろうと
Noun N + であろうと + Noun N + であろうと
Explanation: Presents examples of the same category, often contrasting ones, to emphasize that regardless of which case applies, the result or situation in the following clause remains unchanged and is not affected.
3. ～といい…といい
Explanation: Selects two representative aspects of something to make an overall evaluation: viewed from either aspect, the same assessment applies.
✓ Often used for praise or criticism. The following clause does NOT express the speaker’s intention or desire.
4. ～といわず…といわず
Explanation: Gives two representative nouns A and B to indicate that, without distinguishing between them, the same condition applies throughout the relevant range: “A and B alike / throughout...”. A and B are often closely related elements or parts that together suggest a whole range, such as body parts, places, or periods of time. The pattern emphasizes that a state extends throughout that range; it is not inherently restricted to unfavorable or messy situations, nor should “never used with a negative predicate” be treated as an absolute rule.
