How to use "verge" in a sentence

She was steadily becoming a respected name in the closely-knit Vegas entertainment world, and she believed that she was on the verge of great success.

Several times, she was on the verge of tears as the sight of one object or another released a flood of memories

When they came out of this curve, the trees fell back from the verge, and open sky lay above for the first time since they had departed the county blacktop.

"Right now he's on the verge of starving to death because it's been so long since he's been able to keep any food in his stomach