Some examples and use cases from the internet:

Some examples and use cases from the internet:

• Well you are the foremost expert on alien technology on this planet.
• He's the expert on this.
• Since we last met, I became an expert on Tyler Brennen.
• I need an expert on tropicals.
• I don't know why I'm considered such an expert on chance.
• Relationship advice from Holli Vavasour, the expert on boys.
• My husband's an expert on bricks.
• Bishop's our expert on black helicopters.

• I'm an expert in the field.
• I'm expert in lots of things.
• Juliette, I'm not exactly an expert in these things.
• You're the expert in singing.
• I am an expert in forensic computer data analysis.
• A vast supply of diamonds manipulated by an expert in light refraction.
• He is an expert in covert operations.
• She's an expert in loony extremists.