what the matter is or what is the matter?

[freddie]

Hi there,

Here are 2 sentences for illustration:

1)Do you know what is the matter?

2)Do you know what the matter is?


Which arrangement is correct? and why it is correct?

And how about the below sentences:


Do you know what is it/door catch/...?(any other noun or pronoun can be put here)

Do you know what it/door catch/...is?


Looking forward to your clarification.

countless thanks for you.



Freddie

[Harry Smith]

Hi there,

Here are 2 sentences for illustration:

1)Do you know what is the matter?

2)Do you know what the matter is?


Which arrangement is correct? and why it is correct?

And how about the below sentences:


Do you know what is it/door catch/...?(any other noun or pronoun can be put here)

Do you know what it/door catch/...is?


Looking forward to your clarification.

countless thanks for you.



Freddie

Do you know what the matter is? This sentence is correct because here we have an indirect question.

[Philly]

Hi Freddie

"Do you know" introduces an indirect question and the rest of the question (i.e. after "Do you know") is usually an affirmative construction:

Do you know what time it is?
Do you know why he said that?
Do you know how long they have been married?

[freddie]

Thank you, Harry.

Thank you, Philly.

So kind you are.

Thank you cordially.