Every flat and irregular sentence is called an embarrassing sentence. If more difficult sentences are used in metrical poems, they will become archaic metrical poems. Generally speaking, a specific format (five words "flat" and seven words "flat") can also be regarded as one of the difficult sentences, but it is often used to that extent, which is naturally different from ordinary difficult sentences. There are several kinds of difficult sentences: they are also quite common in metrical poems, but the word "save" must be used in front. The so-called "salvation" means compensation. Generally speaking, the flat sound should be used in the front, and the flat sound must be compensated in the appropriate position in the back (often). The following three situations are more common:
(1) Where the word "Ping" should be used, the first word should be used for compensation, and the third word should be used for compensation to avoid being flattened. In this way, it becomes "plain". The seven words were changed from "even" to "even". This is an inspirational sentence.
(b) Where the word "flat and flat" should be used, the fourth word is flat (or both words are flat), and the third word of the sentence is replaced by a flat voice to compensate. This will become "plain, plain." The seven words become "plain, plain, plain." This is to save each other.
(c) Where the word "flat and flat" should be used, the fourth word is not voiced and the third word is voiced. Seven words is the fifth word, and it is ambiguous. This is a semi-paradox, which can be saved or not, which is slightly different from the strictness of (a) and (b).
Poets often use (b) or (c) in sentences instead of (a). This not only constitutes a sentence of self-help, but also constitutes a sentence of rescue.