"Their help is very helpful."
Translation:Bantuan mereka sangat membantu.
10 CommentsThis discussion is locked.
How about: "Bantuan mereka sangat bermanfaat."
I don't know if it's an accepted translation.
'bermanfaat' = useful, beneficial, advantageous
It seems to me that the mem+bantu would demand an object (siapa) which is absent here.
Yes, 'membantu' is a transitive verb.
With some transitive verbs, the object is optional (semitransitif).
Examples semitransitif (object is optional):
5a1) Tini menyapu. (S-P)
5a2) Tini menyapu rumah. (S-P-O)
5b) Rumah disapu oleh Tini.
6a1) Tini sedang membaca. (S-P)
6a2) Tini sedang membaca buku. (S-P-O)
6p) Buku sedang dibaca oleh Tini.
These are examples from this grammar topic:
Transitive & Intransitive verbs, Tips & notes, Addendum.
https://forum.duolingo.com/comment/29750515
'membantu' is semitransitif (object is optional).