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come up = happen soon
examples:
- Summer is coming up and we’ ll have a lot of work to do at the store.
- Coming up next is the “Mary Anne Show”.
- My birthday is coming up and I have to start writing the invitations.
- Our exams are coming up and we all have to start studying.
- Coming up next in our show after the break: the mystery guest!
count down = wait excitedly and impatiently
- I’m so excited! I’m counting down the days until the wedding!
- After all this bad weather for so long everybody is counting down to the coming of spring.
- -So, are you excited about the trip?
- -Oh, I’m counting down the days!
- We are counting down the day until father is back home again.
