Same-way question tags
Hello everyone!

Could you please help me to clear something up? Actually, my question is, "do people use same-way question tags and if yes, in what situations?" but I guess it doesn't make much sense for native English speakers... Sorry, I don't know how to phrase the question without using some grammar terms :( Hope someone would understand what I'm talking about.

At school we were told that same-way question tags (those in which the main clause and tag are BOTH affirmative or negative) can be used when you're making a statement and not really asking a question. I always understood this as "use them if you're asking a rhetorical question", for example,

The sun rises in the east, DOES it?
("rises" - positive; "does" - positive = a "same-way question tag"),

but now I think I got it all wrong, as usual. Does it make any sense to you or would you just say that the sentence is incorrect? Can you say something like, "You think it was the right thing to do, DO you?", for example?

Question

Same-way question tags
Hello everyone!

Could you please help me to clear something up? Actually, my question is, "do people use same-way question tags and if yes, in what situations?" but I guess it doesn't make much sense for native English speakers... Sorry, I don't know how to phrase the question without using some grammar terms :( Hope someone would understand what I'm talking about.

At school we were told that same-way question tags (those in which the main clause and tag are BOTH affirmative or negative) can be used when you're making a statement and not really asking a question. I always understood this as "use them if you're asking a rhetorical question", for example,

The sun rises in the east, DOES it?
("rises" - positive; "does" - positive => a "same-way question tag"),

but now I think I got it all wrong, as usual. Does it make any sense to you or would you just say that the sentence is incorrect? Can you say something like, "You think it was the right thing to do, DO you?", for example?

Answer

I may be weird, K, but I knew exactly what you were talking about.

Normal (reverse tag questions):
You like that, don’t you? (Rising intonation)
(I believe you like that, but I need confirmation.)

You like that, don’t you. (Or “You like that, don’t you!) (Falling intonation) 
There’s no question — I’m making an emphatic statement. I mean “You really (do) like that.”

Same-way tag questions:
You like that, do you?
This means that you apparently like that, but it’s really hard for me to believe. I may even be calling you a liar. Intonation may be rising, falling, or falling and then rising and maybe falling again (for maximum  sarcasm).

“The sun rises in the west, does it.” This means that you are claiming that the sun rises in the west, and I don’t believe you for one moment.

Note that in most of the examples above, the tag question could be substituted with “really” (said in the appropriate intonation). It’s better to use the right tag question, however.

Answer

If I understand your question, then yes, you can use verbs in an affirmative and negative way simultaneously. Restructuring the example you provided into a slightly more commonly-used way,  we can say, "DID you think that was the right thing to do?". An answer to this question that fits your criteria (unless I'm misunderstanding) could be something along of the lines of "No, I DIDN'T." I hope that helped at all.