how do i blend in background

[For Memories Photography]

I did clipping path and placed them on this background but they don't seem natural how can I make the brackground blend in so it looks better  thanks

[Anna-Lena Ström McGrath]

Use this method next time:
cut-and-paste job

But your issue here is the lack of shadows, right?  They are floating, aren't they?  Can we see a SOOR shot?  The original image (with RAW edits done, but no PS work)

[Kim Howells]

I think it would look more natural if they were casting a shadow, and also if you didn't use such a severe gradient?

[For Memories Photography]

here is out of camera no edits.  I had a tough time trying to get the shadows out and the furniture so i decided to clip it 

[Christina Keddie]

OK, now do your raw processing and post the SOOR, please.