English question

Please answer me my question? <-- this sentence is wrong.
It should be: Please answer my question. (no need to use ME, and should be using full stop instead of QUESTION MARK)

Pair 1
Needn't we go to wanchai?
Do we need go to wanchai.

Ans.
Gramatically, need't we go to Wanchai is correct.
The meaning is: We do not need to go to Wanchai, right?

Do we need go to Wanchai is wrong, becuase we need to use a NEED TO instead of just NEED here.
The sentence should be: Do we need to go to Wahchai?

The above 2 sentences are having different meaning. The first one is saying you think you do not need to go Wanchai and you are getting a confirmation. The second one is saying you really do not know if you need to go to Wanchai.

Pair 2
Do you have a pencil?
Have you a pencil?

Ans.
Do you have a pencil? is the correct one.

If you want to use the format: have you ...., the sentence should be:
Have you GOT a pencil?

Pair 3:

Please tell me should he go to Wanchai?
Please tell me he should go to Wanchai.

Ans:
Please tell me he should go to Wanchai.

PLEASE TELL ME is not a question format, so we cannot use question format here. We should change the sentence SHOULD HE GO TO WANCHAI to a statement.

So the answer is: Please tell me HE SHOULD go to Wanchai. (Full stop has to be used here).

If saying: Please tell me should be go to Wanchai? It's a question format.

Hope the above helps.
(sorry can't type Chinese 'cos my chinese input box on my keyboard is out of order....)