(1) The sentence is an expression of an idea and is complex. The subject and predicate are essential to the complete expression of a sentence, which may be very brief. Indeed one word may have both as απεχει (Mark 14:41).
Mark 14:41 και ερχεται το τριτον και λεγει αυτοις καθευδετε το λοιπον και αναπαυεσθε απεχει ηλθεν η ωρα ιδου παραδιδοται ο υιος του ανθρωπου εις τας χειρας των αμαρτωλω
And he cometh the third time, and saith to them, `Sleep on henceforth, and rest – it is over; the hour did come; lo, the Son of Man is delivered up to the hands of the sinful;
Indeed the sentence does not absolutely require the expression of either subject or predicate.… Learn Koine Greek