• Definitely and Probably

• 
• We can also use definitely and probably for deduction or speculation.

  
  

  Use definitely when we are sure something is true.

  -Amy will definitely be on time for work. She left early.

  
  

  Use probably when we think something is true, but we are not sure.

  -I probably won't pay with cash. I prefer to use a credit card.
•  Click on the play button to hear the audio

• The bank definitely charged Emily an overdraft fee.  She spent $200, but only had $50 in her account.	I probably left my credit card at home. It's not in my wallet.
  Max will probably buy a new car next year. He told me he's saving money every month.	Sam definitely won't go to that restaurant again.  He said it was awful.

• Remember! Use definitely and probably before the main verb or after a modal/auxiliary in affirmative sentences. Use them before both the main verb and the modal/auxiliary in negative sentences.

Source : Alison