Why is the Pali word 'saṅkhārā' in Dependent Origination plural?

In researching Dependent Origination as described in SN 12.2 and using a basic Pali language guide (page 18), I found the following about each main Pali word: > **jarāmaraṇaṃ** singular from maraṇa neuter > > **jati** singular from jāti feminine > > **bhavo** singular from bhava masculine > > **upādānaṃ** singular from upādāna neuter > > **taṇhā** singular from taṇhā feminine > > **vedanā** singular from vedanā feminine > > **phasso** singular from phassa masculine > > **saḷāyatanaṃ** singular from saḷāyatana neuter > > **nāmarūpaṃ** singular from nāmarūpa neuter > > **viññāṇaṃ** singular from viññāṇa neuter > > **saṅkhārā** plural from saṅkhāra masculine > > **avijjā** singular from avijjā feminine The above seems to correlate with every translation I have read. Note: saḷāyatanaṃ may appear to be translated as plural but it appears singular because it includes 'six'. For example, all translations say: "*What is feeling [singular]?*" rather than "*What are feelings [plural]?*" > And what is feeling? Katamā ca, bhikkhave, vedanā? There are these six > classes of feeling. Chayime, bhikkhave, vedanākāyā— Feeling born of > contact through the eye, ear, nose, tongue, body, and mind. > cakkhusamphassajā vedanā, sotasamphassajā vedanā, ghānasamphassajā > vedanā, jivhāsamphassajā vedanā, kāyasamphassajā vedanā, > manosamphassajā vedanā. This is called feeling. Ayaṃ vuccati, > bhikkhave, vedanā. The saṅkhārā condition is described as follows: > And what are **saṅkhārā [plural]**? Katame ca, bhikkhave, saṅkhārā? > > There are three kinds of saṅkhārā. Tayome, bhikkhave, > saṅkhārā— body saṅkhāro [singular], speech saṅkhāro [singular] and mind saṅkhāro > [singular] kāyasaṅkhāro, vacīsaṅkhāro, cittasaṅkhāro. Why is the Pali word 'saṅkhārā' in Dependent Origination plural where all other words are singular?