Lily has read the storybook.Lucy has read the storybook,too.

楼主没有给出变化格式,就多写几种以供参考.
= (Both) Lily and Lucy have read the storybook.
= Not only Lily but (also) Lucy has read the storybook.
= Lily as well as Lucy has read the storybook.
= Lily has read the storybook. So has Lucy.
= Lily has read the storybook, as has Lucy.
= Lily has read the storybook. Lucy has also read the storybook.
= Lily has read the storybook. Lucy has read the storybook as well.
其中后面两句的the storybook也可以换写成it.