Expressing Certainty, Probability, and Doubt

Certainty
➧ Statements that express confidence or surety.

Probability
➧ Statements that indicate something is likely but not certain.

Doubt
➧ Statements that express uncertainty or skepticism.

➧ I’m sure that…
➧ There’s no doubt that…
➧ It’s certain that…

➦ I’m sure that he’ll arrive on time.

➧ It’s likely that…
➧ He’ll probably…
➧ There’s a good chance that…

➦ It’s likely that we’ll finish early.

➧ I doubt that…
➧ It’s unlikely that…
➧ I’m not sure if…

➦ I doubt that she’ll agree to the plan.