Do interrogative words (que, cual, quien) take an accent when they are not used in questions ?

Can you put an accent on the word qué or quién when you use these in the middle of a sentence?
Example: No supe qué le ocurrió or would you say No supe que le ocurrió? What is the rule?

Generally, interrogative words such as que, cual, cuantos, etc. do not take accents in the middle of a sentence:

Lo que quiera hacer esta bien conmigo.	Whatever he wants to do is fine with me.
Es mejor que no ella venga.	It is better that she doesn't come.

But, there are exceptions:

No sabemos cuántos van a llegar.	We don't know how many are going to come.
Dime cuál debo elegir.	Tell me which (one) I should choose.

If you compare the above examples, you will find that in the exceptions, although the sentence does not end in a question mark, they imply an indirect question. To answer your question, the correct form would be: No supe qué le occurió. Sometimes the indirect question may be very obvious as in:

Me gustaría saber dónde esta él.

I would like to know where he is.

And at times, it may be less obvious:

Yo no soy quién para darte consejos.

I am not the person to be giving you advice.

In some cases, accents can change the meaning of a word. Compare the following sentences:

yo sé que va a pasar.	I know that it will happen.
yo sé qué va a pasar.	I know what is going to happen.

Similarly, como may mean like or as, but cómo may be translated as 'how':

A él le gusta cómo ella se viste como una princesa.

He likes how she dresses like a princess.

Given each of the questions below, type in the correct response.  Although capitalization does not count, spelling does (and so do accents)!

Please enter your name

1. No sé decirte. (I don´t know what to tell you.)

2. Me gustaría saber es. (I would like to know who he is.)

3. A ella no le gusta él camina. (She does not like how he walks.)

4. Tienes que escojer prefiere . (You must choose which you prefer.)