Add punctuation: When you go on holiday when do you pack your case
A: When you go on holiday, when do you pack your case?

Add punctuation: Using unreliable recovery software to get back deleted or lost MS PowerPoint files can affect its file structure there by corrupting your file
A: Using unreliable recovery software to get back deleted or lost MS PowerPoint files can affect its file structure there by corrupting your file.

Add punctuation: Of course Thales could have used these geometrical methods for solving practical problems having merely observed the properties and having no appreciation of what it means to prove a geometrical theorem
A:
Of course Thales could have used these geometrical methods for solving practical problems, having merely observed the properties and having no appreciation of what it means to prove a geometrical theorem.