Can/Could 1

Could you give me some advice on how to improve my public speaking skills?

Can you please help me proofread this important document?

I can do advanced calculus in my head without a calculator.

She can speak with a perfect British accent despite being from another country

I can develop and implement a comprehensive marketing strategy for a business.

Can you solve a challenging crossword puzzle in under five minutes?

Can you please donate to this charity that I'm supporting?

Could you please refrain from using your phone during the meeting?

I can navigate through unknown terrain with a compass and a map.

Could you not share copyrighted material without permission?

You can't enter this area without proper authorization.

You can't disclose confidential information to unauthorized persons?

Could you help me identify new opportunities for growth in our business?

Could you offer some suggestions for improving our team’s collaboration and productivity?

You can't park your car in this area, it's reserved for residents only.