It doesn't matter that she comes or not.
Whoever wants to join our club is welcomed.
Whatever you do at your spare time souldn't harm others.
How we can get there in time is what I think about.
1 It doesn't matter whether she comes or not.
2 No matter who wants to join our club will be warmly welcomed.
3 You should never try to hurt others no matter what you do in your part time.
4 We are considering how to get there on time.