My family might come with me.
→ My family might not come with me.
I might go to Nha Trang next month.
→ I might not go to Nha Trang next month.
It might be a doll.
→ It might not be a doll.
Linh might come to the party tonight.
→ Linh might not come to the party tonight.
We might go climbing in the next week.
→ We might not go climbing in the next week.
You might have left it in the shop.
→ You might not have left it in the shop.
$#minosuke$
