B1CEFRGrammar12 min

Adverbs of certainty and where they go

Windmills and watermills

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B1 Grammar ⏱️ 12 mins Topic: Windmills & Watermills

Adverbs of certainty and where they go

Learn how to express certainty clearly and place adverbs in the correct sentence positions.

💡 How to use this lesson

For Teachers

Assign this 12-minute lesson for self-study or warm-up; check answers using the automated key.

Focus student attention on adverb positions relative to main verbs and negatives.

For Learners

Read the 4 quick rules and examples carefully first.

Then complete the 12 practice items step by step.

A historic rustic wooden windmill standing next to a flowing river with an old watermill, wooden gear wheel, serene coun

Historical windmills and watermills feature throughout our examples and practice questions.

Grammar Rules & Patterns

Study the 4 essential rules of adverb position and strength before attempting the exercises.

Rule 1

Adverb Strength & Meaning

Definitely and certainly mean that you are sure. Probably means that you are quite sure, and possibly means that you are not sure. We use them to show how sure we are that something is true or will happen.

📌 The miller will definitely start work early tomorrow.
📌 The old millstone will probably grind the barley today.
📌 My neighbour will certainly come to the party; she told me so.
Rule 2

Position with Present & Past Simple Verbs

With a verb in the present simple or past simple, put the adverb before the main verb. We never put the adverb after the main verb or after its object.

📌 The big wheel definitely rotates fast in high winds.
📌 The ancient watermill possibly crumbles without care.
📌 The shop definitely opens at eight.
Rule 3

Position with Auxiliary Verbs & Negatives

With am, is, are, was, were and with will, put the adverb after the verb. With a negative like won't, put the adverb before it.

📌 The wooden structure is certainly old.
📌 The neglected windmill probably won't work again.
📌 My brother probably won't come with us on Friday.
Rule 4

Starting Sentences with Maybe & Perhaps

Maybe and perhaps mean not sure and usually start the sentence. We do not put maybe between the subject and the verb.

📌 Maybe the owner will modernise the watermill.
📌 Perhaps the miller can store the extra grain.
📌 Perhaps the weather will be better on Sunday.

⚡ Quick Check: Do vs Avoid

✅ Correct Usage

  • The neglected windmill probably won't rotate.
  • Maybe the owner will sell it.
  • They definitely grind barley here.

⚠️ Common Mistakes to Avoid

  • The neglected windmill won't probably rotate.
  • The owner maybe will sell it.
  • They grind barley definitely here.

Practice Exercises

Complete the 12 items below. Pay attention to the clue in brackets for each speaker's certainty level!

Part 1 Choose the Correct Sentence

Question 1 (sure)

Select the sentence that shows you are sure:

____ a. The owner will possibly modernise the watermill next year. ____ b. The owner will probably modernise the watermill next year. ____ c. The owner will definitely modernise the watermill next year. ____ d. The owner will perhaps modernise the watermill next year.
Question 2 (quite sure)

Select the sentence that shows you are quite sure:

____ a. The ancient millstone probably won't grind the barley today. ____ b. The ancient millstone possibly won't grind the barley today. ____ c. The ancient millstone definitely won't grind the barley today. ____ d. The ancient millstone perhaps won't grind the barley today.
Question 3 (not sure)

Select the sentence with the correct placement of 'maybe':

____ a. The miller maybe will repair the old windmill. ____ b. Maybe the miller will repair the old windmill. ____ c. The miller will repair maybe the old windmill. ____ d. The miller repair maybe will the old windmill.

Part 2 Rewrite the Sentence

Question 4 (sure)

Rewrite the sentence by placing certainly in the correct position:

"The watermill rotates fast."

____ (Type your complete rewritten sentence here...)
Question 5 (quite sure)

Rewrite the sentence by placing probably in the correct position:

"The old roof crumbled last winter."

____ (Type your complete rewritten sentence here...)
Question 6 (not sure)

Rewrite the sentence by placing possibly in the correct position:

"The giant millstone will break."

____ (Type your complete rewritten sentence here...)

Part 3 Fill in the Gaps

Question 7 (not sure)

Complete the sentence with the correct option:

"The miller _____ turns the heavy wheel every morning."

____ a. definitely ____ b. probably ____ c. possibly ____ d. maybe
Question 8 (quite sure)

Complete the sentence with the correct option:

"The barley stored in the mill _____ fresh."

____ a. perhaps is ____ b. probably is ____ c. is possibly ____ d. is probably
Question 9 (not sure)

Complete the sentence with the correct option:

"_____ the miller will sell the extra grain at the market."

____ a. Probably ____ b. Definitely ____ c. Maybe

Part 4 Correct the Error in a Message

Question 10 (quite sure)

Read this message to a friend containing an error:

"Hi Sam! The old watermill won't probably rotate today because the water level is low."

Which option fixes the mistake correctly?

____ a. Hi Sam! The old watermill won't rotate probably today because the water level is low. ____ b. Hi Sam! The old watermill probably won't rotate today because the water level is low. ____ c. Hi Sam! The old watermill won't probably rotate today because the water level is low. ____ d. Hi Sam! The old watermill rotate probably won't today because the water level is low.
Question 11 (not sure)

Read this message to a friend containing an error:

"Hey Alex, the miller maybe will modernise the old millstone this spring."

Which option fixes the mistake correctly?

____ a. Hey Alex, the miller will modernise maybe the old millstone this spring. ____ b. Hey Alex, the miller modernise maybe will the old millstone this spring. ____ c. Hey Alex, the miller maybe will modernise the old millstone this spring. ____ d. Hey Alex, maybe the miller will modernise the old millstone this spring.
Question 12 (sure)

Read this message to a friend containing an error:

"Dear Mia, they grind barley definitely with the traditional millstone."

Which option fixes the mistake correctly?

____ a. Dear Mia, they grind definitely barley with the traditional millstone. ____ b. Dear Mia, they grind barley with the traditional millstone definitely. ____ c. Dear Mia, they definitely grind barley with the traditional millstone. ____ d. Dear Mia, they grind barley definitely with the traditional millstone.

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