How to do Control+Backspace on standard USB Keyboard?
The keyboard shortcut to delete the word to the left of the insertion point is, on a Mac keyboard:

OptionDelete



On a Windows keyboard use:
AltBackspace


I use both Windows and macOS on a regular basis and noticed that some keyboard shortcuts that use Control in Windows work with Option in macOS, for example:

Delete the word to the left/right of the insertion point: 


Windows: ControlBackspace / ControlDelete   
macOS:  OptionDelete / Optiondelete⌦


[On keyboards that don't have delete⌦ (Forward Delete) use FnDelete instead.]

Move the insertion point to the beginning/end of the previous word:


Windows: ControlLeft Arrow / ControlRight Arrow  
macOS:  OptionLeft Arrow / OptionRight Arrow  


Extend text selection to the beginning/end of the current word:


Windows: ShiftControlLeft Arrow / ShiftControlRight Arrow  
macOS:  ShiftOptionLeft Arrow / ShiftOptionRight Arrow  


Please refer to https://support.apple.com/en-us/HT201236 for a complete list of keyboard shortcuts (scroll down to the Document shortcuts section for the juicy stuff).