What Is Adverbs Of Certainty? (With Examples And exercise)

Adverbs of certainty are words that show how sure or confident we are about something. They tell us whether something is definitely true, possibly true, or unlikely to happen. For example, words like definitely, probably, surely, certainly, and maybe are all adverbs of certainty.

Here’s a simple example for you to understand it better

• “She will definitely win the race.” (This shows 100% certainty.)
• “He will probably arrive late.” (This shows a high chance but not guaranteed.)

These adverbs help us express our confidence or doubt in a sentence, making our communication clearer and more precise.

100 Adverbs of Certainty List

Serial	Adverbs of Certainty
1	Definitely
2	Surely
3	Probably
4	Certainly
5	Absolutely
6	Undoubtedly
7	Clearly
8	Positively
9	Obviously
10	Truly
11	Naturally
12	Indeed
13	Always
14	Inevitably
15	Evidently
16	Plainly
17	Assuredly
18	Conclusively
19	Convincingly
20	Decidedly
21	Unquestionably
22	Undeniably
23	Without a doubt
24	Beyond question
25	No doubt
26	Surely enough
27	Undoubtably
28	Always true
29	Highly likely
30	Without fail
31	Of course
32	Without hesitation
33	Certainly true
34	Inarguably
35	Factually
36	Totally
37	Completely
38	Thoroughly
39	Utterly
40	Firmly
41	Assuredly so
42	For sure
43	Guaranteedly
44	Plain and simple
45	All the way
46	Without reservation
47	Fully
48	Certainly so
49	Overwhelmingly
50	Surely true
51	Absolutely so
52	Infallibly
53	Totally assured
54	Overconfidently
55	For certain
56	Without error
57	Without exception
58	Undoubtedly so
59	Resolutely
60	Unmistakably
61	Undebatably
62	Sure-fire
63	Perfectly
64	Beyond doubt
65	Pretty sure
66	Rock-solid
67	Wholeheartedly
68	Genuinely
69	Simply put
70	Inescapably
71	Bluntly
72	Firmly established
73	Absolutely positive
74	No argument
75	Clearly established
76	Boldly
77	Quite sure
78	Decisively
79	Unfailingly
80	Irrefutably
81	Beyond reproach
82	Admittedly
83	Not a chance otherwise
84	Always happening
85	Cannot deny
86	Surely so
87	Perfect certainty
88	Without contradiction
89	No hesitation
90	Entirely
91	Beyond dispute
92	Matter of factly
93	Really so
94	Yes indeed
95	Categorically
96	Positively certain
97	Safely assured
98	Notably true
99	Most assuredly
100	Quite assuredly

Read More: 400 Sentences With The Word If for Kids!

Adverbs Of Certainty Exercises

Hey Kids! Reading is boaring huh? I have made some exercise to practice in your home. So, let’s get started-

1. Fill in the Blanks

Complete the sentences using an appropriate adverb of certainty.

1. She will ________ finish her homework before dinner. (Answer: definitely)
2. It is ________ going to snow tomorrow. (Answer: probably)
3. He ________ knows the answer to this question. (Answer: surely)
4. You are ________ welcome to join us for lunch. (Answer: certainly)
5. They will ________ win the game with their current performance. (Answer: undoubtedly)

2. Choose the Correct Option

Choose the correct adverb from the options provided.

1. The team will ________ win the tournament.
   a) possibly
   b) certainly
   c) rarely
   (Answer: certainly)
2. She is ________ the best candidate for the job.
   a) probably
   b) undoubtedly
   c) sometimes
   (Answer: undoubtedly)
3. It will ________ rain later today.
   a) always
   b) surely
   c) probably
   (Answer: probably)
4. He is ________ telling the truth.
   a) absolutely
   b) maybe
   c) seldom
   (Answer: absolutely)
5. You will ________ enjoy the movie.
   a) possibly
   b) positively
   c) surely
   (Answer: surely)

3. Rewrite Sentences

Rewrite the sentences to include an adverb of certainty.

1. “He will complete the project on time.”
   (Rewrite: He will definitely complete the project on time.)
2. “It is going to be a sunny day.”
   (Rewrite: It is undoubtedly going to be a sunny day.)
3. “They can solve the problem.”
   (Rewrite: They can surely solve the problem.)
4. “She will attend the meeting.”
   (Rewrite: She will absolutely attend the meeting.)
5. “The decision was made correctly.”
   (Rewrite: The decision was certainly made correctly.)

4. Match Columns

Match sentences with the correct adverb of certainty.

Sentences	Adverbs
It is going to rain today.	Certainly
He is 100% sure about his decision.	Undoubtedly
The answer to this question is obvious.	Clearly
You can rely on her without question.	Absolutely
They are likely to win the match.	Probably

(Answers: 1–Certainly, 2–Undoubtedly, 3–Clearly, 4–Absolutely, 5–Probably)

5. Spot the Adverb of Certainty

Underline the adverb of certainty in each sentence.

1. She will surely help us finish the task. (Answer: surely)
2. He is definitely the right person for the job. (Answer: definitely)
3. They will probably arrive late due to traffic. (Answer: probably)
4. This is undoubtedly the best decision we could make. (Answer: undoubtedly)
5. The answer is certainly correct. (Answer: certainly)

6. Create Sentences

Write your own sentences using the given adverbs of certainty.

1. Definitely: I will definitely complete my homework tonight.
2. Probably: We will probably visit the park this weekend.
3. Surely: She surely knows the solution to the puzzle.
4. Undoubtedly: This is undoubtedly the most exciting match of the season.
5. Absolutely: He absolutely deserves this award for his hard work.

Read More: 200+ Sentences With Short And Long Vowel Sounds

Final Words

Adverbs of certainty are powerful tools that help us express confidence, doubt, or likelihood in our speech and writing.

Mastering them can make your sentences clearer, more precise, and more effective in communication.

Whether you’re practicing through fill-in-the-blanks, rewriting sentences, or crafting your own, consistent effort will build your skills.

Using words like definitely, probably, or undoubtedly isn’t just about grammar—it’s about adding depth and clarity to your thoughts.

Keep practicing, and soon, you’ll use them effortlessly in both casual and formal settings. Grammar is your best communication tool.