What you choose to wear to work is not important — but everyone knows what is expected of them.
A noun clause has its own subject and verb, but the whole group of words behaves like a single noun.
What you choose to wear is not important. → It is not important.
Everyone knows what is expected. → Everyone knows it.
that · what · how
where · who · why · when
Also which and whether. The clause is always singular.
The clause opens the sentence and takes a singular verb.
Heavy at the front? Move it: It is remarkable that she got the job.
The clause follows the verb — or a preposition. Here that is optional.
Shorten with an infinitive: He's not sure how to use the photocopier.
Where does he live?
What did she want?
I don't know where he lives.
I asked what she wanted.
Inside the clause: subject before verb, and no do / does / did.
I asked what did she want.
Correct: I asked what she wanted.
What they said were completely wrong.
Correct: What they said was completely wrong.
^ Is remarkable that she got the job.
Correct: It is remarkable that she got the job.
I'm not sure if to accept the offer.
Correct: I'm not sure whether to accept the offer.
Say the answer out loud — then tap to check.
WhetherA the proposal will succeedB dependC on the budget, whichD has not been approved.
Cdepend → depends
✓ a noun-clause subject is singular
The evidences suggestA thatB the fire beganC in the basement, althoughD the report is unclear.
AThe evidences suggest → The evidence suggests
✓ evidence is uncountable
She asked whatA the committee had decidedB andC when would the results be publishedD.
Dwhen would the results be published → when the results would be published
✓ a noun clause keeps statement order
Use a noun clause in every answer.
It starts with a question word — it is not a question.