Ruby key words such as def, while, module and class may be selected from a completion list.

This list appears when matching characters are entered as long as Show completion list after a character is typed is selected in the IntelliSense Options (for example, if you enter 'mo', the completion list will highlight 'module'). You can also force the completion list to appear by pressing Ctrl+Space.
See Also
IntelliSense
Intelligent Coding Tools
Member Completion Lists
Variable Completion Lists
Customization
IntelliSense Options