If you WANT/WILL WANT to take a photo, you PRESS/WILL PRESS THIS BUTTON.
WANT - PRESS (KEY: SỰ THẬT)
I SEND/'LL SEND you an invitation if you GIVE/ WILL GIVE me your phone number.
'LL SEND - GIVE
Your mother IS / WILL BE worry about you if you DON'T / WON'T call her.
WILL BE - DON'T