• Degrees of Certainty (Adverbs)

• 
• Common adverbs that show degrees of certainty are:

  -definitely (certain)

  -probably (less certain)

  -possibly (not certain)

  
  

  definitely/probably/possibly + verb

  be verb + definitely/probably/possibly

  
  

  She probably broke her arm.

  Her arm is probably broken.

  
  
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• Sam definitely fits in at his new school.	His car was probably expensive.
  I will definitely move abroad next year.*	Culture shock possibly causes depression.

• *Remember! You can also use adverbs with modals to reinforce a degree of certainty.

  Sam will definitely pass the test. (Very certain)

 

Source : Alison