Summary
In-depth Explanation
Here are some of the most frequently used adverbs of probability, along with their meanings:
Definitely, certainly – 100% certain; there is no doubt about it.
Probably, likely – Likely and expected to happen, but not 100% sure.
Possibly, maybe, perhaps – Might happen, but there is a chance it will not.
Position of Adverbs of Probability
Before the main verb: In most cases, the adverb of probability goes before the main verb.
She probably knows the answer.
They certainly made an impression.
After the verb “to be”: When using the verb “to be,” the adverb of probability goes after it.
The answer is probably correct.
He’s definitely coming to the party.
At the beginning or end of a sentence: Some adverbs of probability, like “maybe” and “perhaps,” usually go at the beginning of a sentence.
Maybe she’ll join us later.
Perhaps we’ll go on vacation next year.
How to Use Adverbs of Probability
Here are the main ways we use adverbs of probability:
Adverbs | Usage | Examples | |
Expressing certainty | • definitely | These adverbs show strong certainty; the speaker is confident that something will happen. | She will definitely pass the exam. They are certainly making good progress. |
Expressing likelihood | • probably | These adverbs show that something is expected to happen, though it is not certain. | It will probably rain tomorrow. He’s likely to arrive late. |
Expressing possibility/uncertainty | • possibly • maybe | These adverbs indicate that something could happen, though it is not guaranteed (the speaker is not sure). | Maybe he’ll call you after work. Perhaps they’ll come to visit us this weekend. |