Hello native English speakers.

The following are different sentences expressing the same meaning.

1. This is the house we wrote to you about.
2. This is the house about which we wrote to you.
3. This is the house; we wrote about the house to you.
4. This is the house, and we wrote you something about the house.
5. This is the house which we wrote about to you.
6. This is the house something about which we wrote to you.
7. This is the house, something about which we wrote you.
8. This is the house, and we wrote something about the house to you.
9. This is the house that we wrote to you about.
10. This is the house which we wrote to you about.

Question:
Which is grammatically correct?
Do they have the same meaning?

Question

Hello native English speakers.

The following are different sentences  expressing the same meaning.

1.  This is the house we wrote to you about.
2.  This is the house about which we wrote to you.
3.  This is the house; we wrote about the house to you.
4.  This is the house,  and we wrote you something about the house.
5.  This is the house which we wrote about to you.
6.  This is the house something about which we wrote to you.
7.  This is the house,   something about which we wrote you.
8.  This is the house,  and we wrote something about the house to you.
9.  This is the house that we wrote to you about.
10.  This is the house which we wrote to you about.

Question:   
Which is grammatically correct?
Do they have the same meaning?

Answer

Wow, you seem to want to cover a lot of possibilities.

1.  This is the house we wrote to you about.  GOOD
2.  This is the house about which we wrote to you.  NOT GOOD.  MAY BE TECHICALLY CORRECT, BUT AWKWARD
3.  This is the house; we wrote about the house to you.  OKAY.  DO AWAY WITH SEMICOLON AND JUST MAKE IT TWO SENTENCES.
4.  This is the house,  and we wrote you something about the house.  NOT GOOD.
5.  This is the house which we wrote about to you.   BAD: AWKWARD WORK ORDER
6.  This is the house something about which we wrote to you.  BAD, PROBABLY INCORRECT
7.  This is the house,   something about which we wrote you.  BAD, DIFFICULT TO UNDERSTAND
8.  This is the house,  and we wrote something about the house to you.  BAD: THIS IS A 'RUN-ON SENTENCE'.  IF YOU MAKE IT 2 SENTENCES, IT'S OK.
9.  This is the house that we wrote to you about.  GOOD
10.  This is the house which we wrote to you about.  BAD (BUT A LOT OF NATIVE SPEAKERS MIGHT MAKE THIS MISTAKE).  'WHICH' SHOULD BE USED FOR SUBORDINATE CLAUSES.

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