He always begins to wark at 6:00 改为否定句

①He always begins to wark at 6:00.
He doesn't always begin to wark at 6:00.
Does he always begin to wark at 6:00?
②He sometimes meets other scientists.
He doesn't sometimes meet other scientists.
Does he sometimes meet other scientists?
③He usually has meals in the office.
He doesn't usually have meals in the office.
Does he usually have meals in the office?
④He often goes for a walk.
He doesn't often go for a walk.
Does he often go for a walk?
⑤He seldom goes shopping.
He doesn't seldom go shopping.
Does he seldom go shopping?