1) know (present simple)
2) have been doing (present perfect continious)
3) Have I told (present perfect)
4) is holding (present continuous)
5) will celebrate (future simple)
6) spend (present simple)
7) Do you have (present simple)
8) have you been doing (present perfect continuous)
9) Are you still working (present continuous)
10) I have just had (present perfect)