Double HIPIL verbs (including participles) lose one of the identical letters.
[[TODO]]==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.
