The subordinator may take the "subject" or "object" position in a noun clause.
Note the usage of the following:
Subordinators which are used in noun clauses:
Remember to preserve word order in noun clauses:
I don't know who he is.
Whoever she is is not important.
Whatever is in the box is a mystery.
Can you tell me what he is doing?
She doesn't undestand why he is leaving.
I wonder how much that costs.
Do you know how long it will take?
design by web design company