Here are some commonly used shortcut keys for Microsoft Office:

1. General:

• Ctrl + N - Create a new document
• Ctrl + O - Open an existing document
• Ctrl + S - Save a document
• Ctrl + P - Print a document
• Ctrl + Z - Undo the last action
• Ctrl + Y - Redo the last undone action

2. Word:

• Ctrl + C - Copy selected text or object
• Ctrl + X - Cut selected text or object
• Ctrl + V - Paste copied or cut text or object
• Ctrl + B - Apply bold formatting to selected text
• Ctrl + I - Apply italic formatting to selected text
• Ctrl + U - Apply underline formatting to selected text
• Ctrl + A - Select all content in a document
• F7 - Run a spelling and grammar check

3. Excel:

• Ctrl + C - Copy selected cells or range
• Ctrl + X - Cut selected cells or range
• Ctrl + V - Paste copied or cut cells or range
• Ctrl + Z - Undo the last action
• Ctrl + Y - Redo the last undone action
• F2 - Edit the selected cell
• Ctrl + F - Open the Find dialog box
• Ctrl + H - Open the Replace dialog box

4. PowerPoint:

• Ctrl + C - Copy selected slide or object
• Ctrl + X - Cut selected slide or object
• Ctrl + V - Paste copied or cut slide or object
• Ctrl + A - Select all slides or objects
• F5 - Start a slideshow from the beginning
• Shift + F5 - Start a slideshow from the current slide
• Ctrl + P - Print a presentation
• Ctrl + D - Duplicate selected slide or object

These are just a few examples of the many shortcut keys that are available for Microsoft Office. Different versions of Microsoft Office may have some variations in shortcut keys. It's always a good idea to check the software's help menu or user manual to learn about specific shortcut keys that may be useful.