“We wondered who Dumbledore had trusted enough to help him, apart
from you.”(Harry Potter and the Sorcerer’s Stone)
Is there no need to put subject of to help, for example, for them? Is the fore-shifted who is the semantic subject of to help?
Answer
[Dumbledore had trusted X enough to help him].
Who was X? ↓
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[who Dumbledore had trusted _ enough to help him]
We wondered who Dumbledore had trusted enough to help him.
Note that Dumbledore trusted X enough to help him is ambiguous. It may mean either:
Dumbledore had sufficient trust in X [for Dumbledore to help X] OR
Dumbledore had sufficient trust in X [that X would help Dumbledore].
But context makes clear what is meant.
Attribution
Source : Link , Question Author : Listenever , Answer Author : StoneyB on hiatus