Aurélie :
So then if someone gives an order to 1 other person to sit in Klingon, it will be < yIba’ > but not < yIba’egh >, because in English you would normally say “sit down” but not “sit yourself down” (although the 2nd phrasing does actually exist, it seems to be nonstandard).
De'vID:
This is true for verbs of movement. But for verbs describing a state, the imperative requires {-'eghmoH}. You can't say, e.g., "be hot!", but must say "Make yourself hot!" See KGT (Klingon for the Galactic Traveler) p. 117.
For those who don't have a copy KGT: (KGT 117): Generally, when a verb describing a state of being (for example, {tuj} ["be hot"]) is used in the imperative form, the suffixes {-'egh} (reflexive suffix) and {-moH} (cause) are used as well... yItuj'eghmoH Heat yourself! ("Cause yourself to be hot!") yItaD'eghmoH Freeze yourself! ("Cause yourself to be frozen!") Okrand has two other non-imperative examples: quv'eghmoH he/she honors him/herself (st.k 11/1997) muptaHvIS tay''eghmoH QeHDaj Hoch All his rage focused in one blow (PB) However - and with Okrand there is always a "however"! - there are some peculiarities with {-'egh}. Here are two of them: (st.k 7/1999): Though not common, it is also possible to use {tatlh} with the reflexive suffix {-'egh} ("do something to oneself") to convey a meaning similar to that of {chegh}: pa'Daq jItatlh'egh "I return to the room" ... The {tatlh'egh} form seems to suggest that the doer of the action is forcing himself/herself to do something, perhaps because it is difficult or not desirable. tatlh return (something) (v) chegh return (to a place) (v) (HQ 10.2:8-9): There are some special uses of the reflexive forms of the finger verbs. For example, while {ghIchwIj vISIq} means "I touch my nose with my index finger" and {ghIchwIjDaq jISIq} means "I point at my nose with my index finger", the phrase {ghIchwIjDaq jISIq'egh} (with {–'egh} "oneself"), literally "I use at myself my index finger at my nose", is used for "I pick my nose with my index finger". Similarly, {nujDajDaq rIl'egh ghu}, literally "at his/her mouth, the baby uses at him/herself his/her thumb", is used for "the baby sucks its thumb". [...] It also works with the toe verbs: {nujDajDaq mar'egh ghu} "the baby sucks its big toe". SIq use the index finger (v) rIl use the thumb (v) mar use the big toe (v) [Yes Aurélie, there is a different verb for each finger and toe!] -- Voragh tlhIngan ghantoH pIn'a' Ca'Non Master of the Klingons