The structure 不是…还(是)…
The structure 不是…还是… 
is translated as “it is not enough..., also…”. The ellipses are usually replaced with verb phrases.
is translated as “it is not enough..., also…”. The ellipses are usually replaced with verb phrases. Pay attention
还是 can be shortened to 还.
Scheme
subject
不是
А
还(是)
В
This structure has the following meaning: action “A” is not enough, so you also need to do action “B”.
Examples
不是读完了就可以了，还应该写一篇作文
It is not enough to finish the book, you also have to write an essay
bú shì dúwán le jiù kěyǐ le, hái yīnggāi xiě yì piān zuòwén
这事不是你想做就能做的，还是要听听老板的意见
This is not a situation where you can do whatever you want. You also have to listen to your boss’ opinion
zhè shì bú shì nǐ xiǎng zuò jiù néng zuò de, háishì yào tīngtīng lǎobǎn de yìjiàn