He often buys some bread on his way home.改成否定句、、、

从否定句最基本的定义上来看是doesn‘t
He doesn‘t often buy some bread on his way home
而often的意思是经常,那么不经常就是seldom,因此还可以改为
He seldom buys any bread on his way home
楼上的never是从不的意思,所以都不正确.