Hello. Are both questions grammatically correct?
What your post code is?
What is your post code?siegel What your post code is? What is your post code?
New words, one handy idiom, and a 2-minute quiz — delivered to your inbox to keep your streak alive.
You can use the first clause as an indirect question (interrogative subordinate clause):
Could you tell me what your post code is?
siegelWhat is your post code?
Correct.
Consider the answer: [My post code]subj [is]verb 99999.
The subject (my post code > your post code) and the verb (is) are inverted in the question, so "is" comes before "your post code" in the question form.
What [is]verb [your post code]s
siegelWhat your post code is?
Asking questions with this incorrect word order is a common mistake made by native speakers of other languages and makes them stand out.