gradual副词为什么双写l再加y

不是双写l再加y，而是直接在其后加ly，这是形容词变副词的规律。gradually

Controls in the city have graduallytightened.对这个城市的控制逐渐加强。

Gradually the surrounding farmland turned residential.周围的农田渐渐变成了住宅区。

The sea is gradually encroaching on the land.海水渐渐地侵蚀了陆地。

His interest in this subject graduallydecreases.他对这门学科的兴趣逐渐减退。

Her long illness gradually sapped her strength.长期的患病使她的体力渐渐衰竭。

By small degrees or increments gradually.逐渐地慢慢地或逐渐增长地 渐渐地

Little by little gradually.一点一点地 逐渐地