Grammar
Finite and non-finite verbs: find what changes
Which verb carries tense in this verb group? Some sentences have one finite verb. Longer groups can include non-finite forms.
In one verb group, find the verb that carries grammatical tense or agreement. This guide helps you keep the other verb forms in place.
Try what you have learned
Listen to a recording, type what you hear, and check your answer.
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wanted to start WANT-id-tuh-START
Listen for two beats in wanted. The vowel in WANT differs across accents, but the ending sounds like id.
The short answer
In a verb group, find the finite verb that carries grammatical tense or agreement. Infinitives and participles stay fixed; a core modal can be finite without changing form.
She wanted to visit the new office yesterday.
Why it works: Wanted takes the past tense, while to visit stays in its base form.
3 more examples
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Talking about a morning choice
He decided to call the clinic after breakfast.
Decided takes the past ending, but to call stays in its base form.
Not this:He
decided to calledthe clinic after breakfast. What changes: Changing the infinitive to called makes the sentence ungrammatical. -
Describing an action in progress
We were waiting for the train on platform four.
The finite auxiliary were shows past time, while waiting is a non-finite participle.
Not this:
We waitingfor the train on platform four. What changes: Dropping the helper verb were leaves the sentence incomplete. -
Checking home security
I've locked the door before leaving the flat.
Have shows present time, while locked is a past participle.
Not this:
I've lockthe door before leaving the flat. What changes: Using the base form lock breaks the present perfect pattern.
Quick check
Which sentence changes the starting form to the past correctly?
Answer: They wanted to start early.
Show the answer
Answer: They wanted to start early.
The finite verb wanted carries past time. The to-infinitive to start never changes.
Read the full guide
Try the listening exerciseYou may look at several verbs in one verb group and hesitate over which one to change. Find the verb that carries tense. Keep the other forms in place.
Find the word that changes
The problem: I never know which word in the verb group can change and which word must stay the same.
When you tell a story, find the verb that carries tense. One verb is finite in this group. The other forms stay basic or participial. A base-looking form such as I work can still be finite.
Wants is finite and shows present time, while the action verb stays fixed.
She wants to leave early today.
Wanted changes to show past tense, while to leave stays untouched.
She wanted to leave early today.
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They plan to buy tickets after lunch.
Why it works: Plan shows present tense, and to buy stays fixed.
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They planned to buy tickets after lunch.
Why it works: Planned carries the past tense, while to buy remains unchanged.
Your turn
Which sentence shows the correct past form of 'He hopes to win'?
Answer: He hoped to win.
Show the answer
Answer: He hoped to win.
The finite verb hoped carries the past tense. The non-finite verb to win stays in its base form.
Leave non-finite endings alone
The problem: I changed to go into to went after a past verb because I thought everything in the sentence had to change to past.
With infinitival to, the next verb uses its base form. Infinitives never take tense endings. But to can also be a preposition: in look forward to meeting, the -ing form follows prepositional to.
-
Not this:
We decided to went home early.Say: We decided to go home early.
Decided carries the past tense. The verb after infinitival to stays in its base form: to go.
-
She asked us to help with the boxes.
Why it works: Asked carries past time, while to help stays unchanged.
Your turn
Which sentence keeps the infinitive in its correct form?
Answer: They agreed to sign the contract yesterday.
Show the answer
Answer: They agreed to sign the contract yesterday.
Agreed shows past time. The infinitive to sign stays in its base form.
Tell past simple from participles
The problem: The two forms look the same to me, so I guess whether walked is a past verb or a participle.
To tell whether an -ed form is finite or participial, read the whole verb group. Look from left to right. In has already finished, has carries present tense and finished is a participle. In can have finished, can is finite while have and finished are non-finite.
It stands alone without a helper and shows what happened.
We cleaned the kitchen after dinner.
It follows a finite verb in the group, which carries the tense.
We have cleaned the kitchen already.
-
She painted the fence yesterday.
Why it works: Painted is a finite verb standing alone.
-
She has painted the fence already.
Why it works: Has carries the present tense, and painted is a participle.
Your turn
Show the answer
Answer: They have finished the morning shift.
Have is the finite helper. Here, finished is a non-finite participle.
Give -ing verbs an anchor
The problem: I said she waiting outside and forgot that an -ing word cannot be the main verb alone.
For an action in progress, use be with an -ing form: She is waiting. An -ing form can also describe a noun: in people waiting outside, waiting adds information about people.
-
Not this:
She waiting at the bus stop right now.Say: She is waiting at the bus stop right now.
Waiting cannot stand alone as the main verb. Add the finite helper is to complete the sentence.
-
The children were playing in the garden.
Why it works: Were carries past tense, while playing provides the action meaning.
Your turn
Which option makes a complete sentence?
Answer: He was cooking dinner when the phone rang.
Show the answer
Answer: He was cooking dinner when the phone rang.
Was is the finite verb that anchors the participle cooking in past time.
Before you go
Question 1 of 2
Complete the sentence with the correct form of start.
Answer: Yesterday she decided to start early.
Show the answer
Answer: start
Decided is the finite past verb. The to-infinitive start stays in its base form.
Question 2 of 2 · One new sentence
You are reporting your team's project progress at work. Which update is correct?
Answer: We planned to finish the report yesterday, but we need to update the charts today.
Show the answer
Answer: We planned to finish the report yesterday, but we need to update the charts today.
Planned and need carry tense. The infinitives to finish and to update remain in their base forms.
Remember this
Find the finite verb first. Keep the other forms in place.
Listen first
Listen and write
Listen, type what you hear, then choose Check my answer. Use a hint when you get stuck.
0 of 4 done
Listening 1 of 4
Listen, then type what you hear. Replay as often as you need.
0:00
Read the transcript
She wanted to visit the new office.
Wanted carries the past tense, while to visit stays unchanged.
Listening 2 of 4
Listen, then type what you hear. Replay as often as you need.
0:00
Read the transcript
Did you remember to lock the front door?
Did shows past time, leaving remember in its base form.
Listening 3 of 4
Listen, then type what you hear. Replay as often as you need.
0:00
Read the transcript
They're sitting near the window all morning.
They're contains the finite helper are before the participle sitting.
Try a longer clip. Listen once, then replay the part you missed.
Listening 4 of 4
Listen, then type what you hear. Replay as often as you need.
0:00
Read the transcript
We've decided to review the whole project draft today. Our team plans to update all the main charts. The manager wants to check the numbers before noon.
Have is finite; decided is a participle. Plans and wants are finite.
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Test yourself
Listen to a new clip and write what you hear. You can replay it, but hints stay off and the transcript opens after you check your answer.
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Listening 1 of 3
Listen, then type what you hear. Replay as often as you need.
Explaining weekly chores
0:00
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He helps us clean the kitchen every Friday.
Helps is the finite verb that agrees with he.
Listening 2 of 3
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Discussing workshop preparations
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They've promised to send the revised schedule this morning. Our staff worked hard to prepare the main meeting room. Everyone hopes to start the training session on time.
Have, worked and hopes are finite. Promised is a participle; the infinitives stay fixed.
Listening 3 of 3
Listen, then type the missing words. The rest of the text is already there.
A mechanic reporting car repairs to a customer
0:00
Read the transcript
The mechanic examined the broken engine very carefully this morning. He's promised to replace the worn belt before lunch. We're waiting to test the car on the road afterwards. Our senior technician agreed to check the brakes as well. We've planned to clean the workshop before the afternoon rush. The customer expects to collect the keys by five.
Finite verbs carry tense while infinitives and participles stay in fixed forms.
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Save my progressQuestions about "Finite and non-finite verbs: find what changes"
What is a finite verb?
A finite verb can show grammatical tense or agree with its subject. A base-looking form can be finite, as in I work. Core modals such as can are finite too, although they do not take -s or ordinary tense endings.
Rina works from home on Fridays.
Rina wants to work from home on Fridays.
How can I tell a past verb from a past participle?
Read the whole verb group from left to right. In has already washed, has is finite and washed is a participle. In can have washed, can is finite; have and washed are non-finite.
Omar washed the mugs after lunch.
Omar has washed the mugs.
Does to always introduce an infinitive?
No. To can also be a preposition. After a verb such as look forward to, the next word can be an -ing form. Check the whole phrase before you choose the verb form.
We hope to meet the new manager.
I look forward to meeting the new manager.
Can an -ing verb be the main verb of a sentence?
Yes, as part of a continuous verb group. In are blinking, are is finite and blinking gives the action. In the second example, blinking outside describes lights; are is the finite verb in the full sentence.
The lights are blinking outside.
The lights blinking outside are very bright.
Can one sentence have more than one finite verb?
Yes. A sentence with more than one clause can have a finite verb in each clause. Find verb groups one clause at a time, instead of looking for one finite verb in the whole sentence.
Maya said that the train was late.
If the rain stops, we can walk home.