Common Mistakes with the Verb ‘think’
The verb think is one of the most frequently used verbs in English, yet it is also one of the most commonly misused. The core mistake learners make is treating think like a verb of certainty or direct perception, when in fact it expresses an opinion, belief, or mental process. This article directly explains the most frequent errors—including incorrect tense usage, missing prepositions, and confusing think with believe or know—and gives you clear, practical fixes for real writing, email, and conversation.
Quick Answer: The Three Biggest Mistakes with ‘think’
- Mistake 1: Using the past tense when you mean a present opinion. Wrong: “I thought it is a good idea.” Right: “I think it is a good idea.”
- Mistake 2: Forgetting the preposition of or about when expressing an opinion or consideration. Wrong: “What do you think the movie?” Right: “What do you think of the movie?”
- Mistake 3: Using think to report a fact or certainty. Wrong: “I think the sun rises in the east.” Right: “I know the sun rises in the east.”
Understanding the Core Meaning of ‘think’
Think is a mental process verb. It describes forming an opinion, having a belief, using your mind to reason, or considering something. It is not a verb of fact. This distinction is crucial for natural English.
In formal writing, think often signals a subjective position. In informal conversation, it is used constantly to soften statements or express personal views. In email, I think can sound polite or uncertain depending on context. Compare:
- Formal email: “I think we should consider the budget implications.” (polite suggestion)
- Informal conversation: “I think that pizza is the best.” (personal opinion)
- Factual statement: “I know the meeting is at 3 PM.” (not think)
Common Mistake 1: Confusing Present and Past Tense
Learners often use the past tense thought when they mean a current opinion. This creates confusion about timing.
Incorrect
- “I thought this restaurant is good.” (sounds like you changed your mind)
- “She thought the report is ready.” (implies it is not ready now)
Correct
- “I think this restaurant is good.” (current opinion)
- “She thinks the report is ready.” (current belief)
Use thought only when referring to a past belief or opinion that may or may not have changed.
Natural Examples
- “I thought you were coming to the party.” (past expectation, now disappointed)
- “I think you should take the train.” (present advice)
- “We thought the price was fair, but now we are not sure.” (past opinion, now uncertain)
Common Mistake 2: Missing Prepositions
When asking for an opinion, think almost always needs a preposition. The most common are of and about. They are not interchangeable in all contexts.
Comparison Table: ‘think of’ vs. ‘think about’
| Phrase | Meaning | Example |
|---|---|---|
| think of | Have an opinion; recall; imagine | “What do you think of the new design?” (opinion) |
| think about | Consider; reflect on; have in mind | “I am thinking about changing jobs.” (consideration) |
Common Errors
- Wrong: “What do you think the plan?”
- Right: “What do you think of the plan?”
- Wrong: “I am thinking to move.”
- Right: “I am thinking about moving.” (or “I am thinking of moving.”)
In informal conversation, native speakers sometimes drop the preposition in very casual speech (“What do you think?” is fine as a standalone question), but when followed by a noun, the preposition is required.
Common Mistake 3: Using ‘think’ for Facts
This error makes you sound uncertain or uninformed. Use know, be sure, or be certain for facts.
Incorrect
- “I think water boils at 100 degrees Celsius.”
- “I think she is my sister.”
Correct
- “I know water boils at 100 degrees Celsius.”
- “She is my sister.” (no need for think)
When to use it
Use think when you are expressing a belief, opinion, or hypothesis. Use stronger verbs for established facts.
Common Mistake 4: Incorrect Negative Forms
The negative of think can be tricky. In English, we usually negate the verb think, not the following clause.
Incorrect
- “I think he is not coming.” (grammatically possible but less natural)
Correct
- “I don’t think he is coming.” (standard English)
This pattern applies to most opinion verbs: I don’t believe, I don’t suppose, I don’t imagine.
Natural Examples
- “I don’t think this is a good idea.”
- “She doesn’t think we should wait.”
- “They don’t think the project will finish on time.”
Better Alternatives to ‘think’
Depending on your meaning, you can replace think with more precise verbs.
- Believe – stronger conviction. “I believe the evidence supports our case.”
- Suppose – tentative assumption. “I suppose we could try that.”
- Assume – without proof. “I assume the meeting is still on.”
- Consider – deliberate thought. “I am considering your proposal.”
- Feel – emotional opinion. “I feel we should apologize.”
- Reckon – informal, especially British English. “I reckon it will rain.”
In formal email, I believe or I am of the opinion can sound more professional than I think. In conversation, I think is perfectly natural.
Mini Practice: Test Your Understanding
Choose the correct option for each sentence.
- What do you _____ the new policy? (think of / think about / think)
- I _____ she is arriving tomorrow. (think / know / am thinking)
- _____ he is wrong. (I think not / I don’t think / I think no)
- She is _____ moving to London. (thinking of / thinking to / think about)
Answers
- think of (asking for opinion)
- know (if it is a fact) or think (if it is a belief)
- I don’t think (standard negative form)
- thinking of (or thinking about)
FAQ: Common Questions About ‘think’
1. Can I say “I think yes” or “I think no”?
These are possible in very informal spoken English, but they are not standard. Use “I think so” or “I don’t think so” instead. For example: “Is it going to rain?” – “I think so.”
2. What is the difference between “I think” and “I am thinking”?
I think expresses a belief or opinion. I am thinking describes the ongoing mental process. Compare: “I think this is a good restaurant.” (opinion) vs. “I am thinking about what to order.” (process).
3. Is “I think that” always necessary?
No. In informal English, that is often dropped. “I think it is fine” is just as correct as “I think that it is fine.” In formal writing, including that can improve clarity.
4. How do I use “think” in reported speech?
When reporting a past thought, use thought and shift the tense of the following verb back. Example: Direct: “I think she is nice.” Reported: “He thought she was nice.”
Final Note for Learners
Mastering think will make your English sound much more natural. Focus on three rules: use the correct tense for your meaning, always include a preposition when asking for an opinion, and do not use think for facts. Practice by writing short sentences about your daily opinions and check for these common errors. For more help with verb forms and common mistakes, explore our Common Verb Mistakes section or review Verb Forms Explained for deeper grammar support.
