My DS is 10 months next week and won't really bear weight on his legs. If you keep lifting him up he will stand for a second but flops back down. I've tried standing him at the sofa and he just wants to sit. If I leave him on the floor he can get around the room by rolling, he pushes himself up and moves himself round with his hands too.
He didn't do loads of tummy time when he was little because of reflux. I'm starting to get concerned as I know a little boy the same age, literally born the same day and he's on all 4's pushing his bum up in the air and is now standing and my lb is doing neither