Do you think + yes/no indirect question. Why no 'if/whether'?

[skelerobo]

Hi I'm teaching Indirect questions and I've read that when the Indirect question is yes or no you use 'if' or 'whether'

Can I ask if you're depriving Hayley?
Do you know if you're depriving Hayley?
could I ask if you're depriving Hayley?

But now my book has thrown

"Do you think you're depriving Hayley?', at me. Is this an indirect question? Why doesn't it use the 'if'/ 'whether' structure?

Thank you for any help.

 

[5jj]

Can I ask if you're depriving Hayley?
Do you know if you're depriving Hayley?
could I ask if you're depriving Hayley?

"Do you think (that) you're depriving Hayley?'

In all four examples, the part I have coloured blue is placed inside a direct question. Let's rephrase them to cut out the directt question:

I am asking if you are depriving Hayley.
I would like to know if you are depriving Hayley.
I would like to ask if you are depriving Hayley.

I would like to ask if you think (that) you are depriving Hayley.

It should now be clear that your fourth example is actually a direct question about an indirect affirmative statement.
.

 

[skelerobo]

I think I see it now. Thank you very much for the explanation.