This girl does not play MMOs, or if she does, she's in the minority.

这类女孩不怎么玩网游，如果玩的话，也在少数。

youdao

She does not know if he is alive or dead.

她不知道他是活还是死。

《柯林斯英汉双解大词典》

Everybody has something to do. And if he or she does it well, then the country will run well.

每一个人都有一些事情要做，如果他或她做的好，这个国家就会运行的好。

youdao

Or,that green-eyed monster may affect your friend if you get a pay raise and she does not.

VOA: special.2010.05.23

If he or she does not, it is the end of the world.

FORBES: The Great Optimism Divide

What happens if he or she does not receive a majority of votes?

CNN: Lesson plan: The electoral process

For example, a person who feels strongly against abortion can designate the NARAL Pro-Choice America Foundation as the recipient of the money if he or she does not meet a personal goal.

CNN: Putting a price on procrastination