hαs否定形式

否定形式是has not，例如：

1、She has not changed much over the years.這些年來她沒有多大變化。

2、Growth has not been uniform across the country.全國各地的發展程度不一。

3、The new drug has not yet been licensed in the US.這種新藥尚未在美國獲得許可。