Conjugation of "Think" — All Forms, Examples, and Usage
Use your mind to consider something; form an opinion or judgment.
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All 12 Tenses of "Think"
Quick reference table — every tense form of "think" with the first-person example and a link to the grammar guide for that tense.
| Tense | Example (I) | Quick rule |
|---|---|---|
| Simple Present | I think |
Used for habits, facts, routines, and permanent situations. Full rule → |
| Simple Past | I thought |
Used for completed actions at a specific time in the past. Full rule → |
| Simple Future | I will think |
Used for predictions, decisions made at the moment, and promises. Full rule → |
| Present Continuous | I am thinking |
Used for actions happening right now or temporary situations. Full rule → |
| Past Continuous | I was thinking |
Used for actions in progress at a specific moment in the past. Full rule → |
| Future Continuous | I will be thinking |
Used for actions that will be in progress at a specific future time. Full rule → |
| Present Perfect | I have thought |
Used for past actions with present relevance, life experiences, or unfinished situations. Full rule → |
| Past Perfect | I had thought |
Used for an action that was completed before another past action. Full rule → |
| Future Perfect | I will have thought |
Used for an action that will be completed before a specific future time. Full rule → |
| Present Perfect Continuous | I have been thinking |
Used for actions that started in the past and continue now, with focus on duration. Full rule → |
| Past Perfect Continuous | I had been thinking |
Used for ongoing actions in the past that continued up to another past moment. Full rule → |
| Future Perfect Continuous | I will have been thinking |
Used for actions that will have been ongoing up until a specific future time. Full rule → |
Past Tense of "Think" — Thought
The past simple of "think" is "thought". Use it for completed actions at a specific past time. Because "think" is irregular, "thought" is not formed by adding -ed — you have to memorize this form. See our simple past tense guide for a deeper explanation of the simple past.
Past Participle of "Think" — Thought
The past participle of "think" is "thought". Use it after "have/has/had" for the perfect tenses ("I have thought"), and after "be" for passive constructions ("It was thought"). Because "think" is irregular, "thought" is not the same as the past simple — students often confuse the two forms.
Is "Think" Regular or Irregular?
"Think" is an irregular English verb. Its principal parts are: base form "think", past simple "thought", and past participle "thought". The 3rd-person singular present is "thinks" and the present participle/gerund is "thinking". Conjugation pattern: think-thought-thought.
Conjugation pattern: think-thought-thought
How to Pronounce "Think" and Its Forms
Think: /θɪŋk/ — Stress pattern: O
Rhymes with 'link' and 'sink'; 'nk' sound at end.
How to Use "Think" — Common Grammar Patterns
'I think...' for opinion; 'thinking about' for active thought.
Example Sentences with "Think" in Different Tenses
- Simple Present: I think the movie was great. A1
Common Collocations with "Think"
- think about — I need to think about this decision.
- think of — What do you think of my new dress?
- think carefully — Think carefully before answering.
- think differently — Young people often think differently.
- think hard — She thought hard about the problem.
When to Use "Think" vs Similar Verbs
Smart synonyms — when to use each one
- believe — when expressing an opinion or judgment
- consider — when examining something very carefully
Common Mistakes with "Think"
-
Wrong: He think it's a good idea.
Correct: He thinks it's a good idea.
Add "s" for third-person singular. -
Wrong: I thinking about it.
Correct: I am thinking about it. / I think about it.
Use continuous or simple present; not "I thinking". -
Wrong: They thinked about moving.
Correct: They thought about moving.
Past tense is "thought", not "thinked".
Conjugation Tables for "Think"
Negative Forms
- Simple present: I do not think · He does not think
- Simple past: I did not think · She did not think
- Present perfect: I have not thought · He has not thought
Question Forms
- Simple present: Do you think? · Does he think?
- Simple past: Did you think?
- Present perfect: Have you thought?
Passive Voice (where applicable)
- Simple present passive: It is thought
- Simple past passive: It was thought
- Present perfect passive: It has been thought
Frequently Asked Questions About "Think"
- Is "think" regular or irregular?
- "think" is an irregular verb. Its past simple is "thought" and past participle is "thought". You must memorize these forms.
- What is the past tense of "think"?
- The simple past of "think" is "thought".
- Are the past simple and past participle the same for "think"?
- Yes, for this irregular verb, both the past simple and past participle are "thought".
- What's a common mistake with "think"?
- Add "s" for third-person singular. Wrong: "He think it's a good idea." Correct: "He thinks it's a good idea."