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POAL seems to have the same participle and perfect as PIEL, but with added wav between the 1st and the 2nd letters of the word. [[TODO]]: What are participles of empty verbs in PIEL? See http://linguistics.stackexchange.com/a/17709/13300 ==HIPIL== Most often HIPIL means causative verbs. If the corresponding PAAL is transitive, then the verb in HIPIL may be “twice transitive” (have two direct objects, the object of cause of an action and the object of an action itself). A special case of causative: To allow to make some action. HIPIL verbs derived from adjectives means the action which makes the subject or object to be of this adjective. There are other meanings of HIPIL. In perfect and imperative, infinitive, absolute infinitive also the prefix ה is added. Participle is formed adding to the root a prefix מ and י between the second and the third letters of the root. Infinitive is formed adding to the root a prefix ה and י between the second and the third letters of the root. In verbs 1-נ that נ is omitted in perfect, imperfect, imperative, and participle. Patterns of declension (note י between the second and the third letters of the root in some forms): Perfect: {| class="grammar"! person !! gender !! singular !! plural|-|rowspan=2| 3rd || masculine || השמיד ||rowspan=2| השמידו|-| feminine || השמידה|-|rowspan=2| 2nd || masculine ||rowspan=2| השמידת || השמדתם|-| feminine || השמדתן|-| 1st || || השמידתי || השמדנו|} Imperfect: {| class="grammar"! person !! gender !! singular !! plural|-|rowspan=2| 3rd || masculine || ישמיד || ישמידו|-| feminine || תשמיד || תשמדנה|-|rowspan=2| 2nd || masculine || תשמיד || תשמידו|-| feminine || תשמידי || תשמדנה|-| 1st || || אשמיד || נשמיד|} In 1-נ the first נ is omitted in all HIPIL verb forms (including participles). In most 1-י verbs the י is replaced with ו in HIPIL verbs (including participles). 3-weak verbs and participles have the same declension specifics as in PAAL. In empty verbs (including participles) of the binyan HIPIL the second letter of the root is skipped. Often in perfect of HIPIL emtpy verbs or double verbs before a suffix after the root of the verb is inserted the letter ו (not in 3rd person singular). Double HIPIL verbs (including participles) lose one of the identical letters. ==HOPAL== HOPAL is a passive of HIPIL. Perfect of HOPAL is formed adding a prefix ה to the root. Imperfect is the same of a PAAL. A participle is formed adding a prefix מ to the root. In 1-נ the first נ is omitted in all HOPAL verb forms (including participles). In most 1-י verbs the י is replaced with ו in HOPAL verbs (including participles). 3-weak verbs and participles have the same declension specifics as in PAAL. In empty verbs (including participles) and double verbs (including participles) of the binyan HOPAL the second letter of the root is skipped and before the root is added the letter ו. ==HITPAEL== In HITPAEL it is added a prefix הת in perfect, imperative, infinitive to the root. In imperfect it is added ת between the prefix of imperfect and the root. In participle it is added a prefix מת. If a root starts with ס, ז, ש, צ, then this letter exchanges in place with the letter ת of the prefix. Also with ז the ת of the ת in the prefix is replaced with ד; with צ the ת in the prefix is replaced with ט. If the root starts with ת, ד or ט, then the ת in prefix is omitted. Double verbs in HITPAEL are declined like regular ones. In 1-י that י is sometimes replaced with ו in HITPAEL. HITPAEL may mean:*reflexive;*mutual;*other. ==POLEL, POLAL, HITPOLEL== These are binyanim from empty verbs which are formed instead of PIEL, PUAL, and HITPAEL. In these binyanim the last (third) letter of the root is doubled. ==Other binyanim== There are also some rare binyanim in biblical Hebrew. Their declension is mostly unknown. From Gesenius' grammar: ===POEL and POAL=== An aim or endeavor to perform the action, especially with hostile intent. POAL is passive from POEL. Their declension is probably the same. Examples: * Perfect: קוטל* Imperfect: יקוטל* Participle: מקוטל ===HITPOEL=== Reflexive. * Perfect: התקוטל ===PALEL and PULAL=== PULAL is passive from PALEL. Their declension is probably the same. Examples: * Perfect: קטלל ===HITPALEL=== Perfect: התקטלל ===PALAL and its passive=== Used of movements repeated in quick succession. * Perfect: קטלטל ===PILPEL=== Only for empty verbs. * Perfect: גלגל (passive is the same) ===HITPALPEL=== Reflexive of PILPEL. * Perfect: התגלגל ===TIPHEL=== * Perfect: תקטל ===SAPHEL=== * Perfect: שקטל