i think so

USAGE SUMMARY

"I think so" is correct and usable in written English.
You can use it when you want to give a tentative response to a question or opinion. For example, "Do you think this dress looks good on me? I think so."

✓ Grammatically correct

News & Media

Academia

Science

Human-verified examples from authoritative sources

Exact Expressions

57 human-written examples

Bramel: I think so.

The New York Times

I think so, anyway.

The New Yorker

"But I think so".

The New York Times - Sports

Sometimes I think so.

The New York Times

A. I think so.

The New York Times

Yeah, I think so.

The New York Times

I think so.

The New York Times - Magazine

HALPRIN I think so.

The New York Times - Arts

Human-verified similar examples from authoritative sources

Similar Expressions

3 human-written examples

"Yes, I thought so".

The New Yorker

I thought so too"?

The New York Times

"I thought so, ma'am.

The New York Times

Expert writing Tips

Best practice

Use "i think so" when you want to express agreement but are not entirely certain or lack complete information. It's ideal for softening potentially assertive statements.

Common error

Avoid using "i think so" excessively in formal writing or situations requiring strong conviction. Over-reliance on this phrase can make you sound indecisive or unsure of your statements.

Linguistic Context

The primary grammatical function of "i think so" is to serve as an affirmative response expressing a degree of uncertainty or tentative agreement. It indicates that the speaker generally agrees with a statement but lacks complete certainty or definitive knowledge. The Ludwig AI confirms its grammatical correctness.

Expression frequency: Very common

Frequent in

News & Media

63%

Science

21%

Academia

16%

Less common in

Ludwig's WRAP-UP

In summary, "i think so" is a common and grammatically correct phrase used to express tentative agreement or belief. Ludwig's analysis of numerous examples reveals that it is frequently used in news and media, science, and academic contexts, reflecting a neutral register. While widely accepted, it's important to use this phrase judiciously, especially in formal settings where stronger affirmations might be more appropriate. The Ludwig AI confirms its validity, noting its suitability for softening potentially assertive statements.

More alternative expressions

Phrases that express similar concepts, ordered by semantic similarity:

i believe so

Replaces "think" with "believe", indicating a slightly stronger sense of conviction, but maintains the same affirmative uncertainty.

i suppose so

Uses "suppose" instead of "think", suggesting a reluctant or less enthusiastic agreement.

i guess so

Substitutes "think" with "guess", implying a higher degree of uncertainty or speculation.

i imagine so

Replaces "think" with "imagine", indicating that the speaker is forming a mental picture or expectation.

that seems likely

Offers a more objective assessment of probability, rather than a personal opinion.

i would assume so

Uses "assume" instead of "think", suggesting the conclusion is based on prior knowledge but not concrete evidence.

i'm inclined to think so

Adds a layer of personal inclination, suggesting a predisposition to the idea.

it seems that way to me

Shifts the focus to the speaker's personal perception.

i'm fairly certain

Expresses a moderate level of certainty.

i am of that opinion

Uses more formal language to convey agreement.

FAQs

How can I use "i think so" in a sentence?

Use "i think so" as a short, affirmative response when you generally agree with a statement or suggestion, but aren't completely certain. For example, "Do you think it will rain today? I think so".

What's the difference between "i think so" and "i know so"?

"I think so" indicates a level of uncertainty or assumption, while "i know so" implies certainty and direct knowledge. Use "i know so" when you possess concrete evidence or facts.

What are some alternatives to "i think so"?

Depending on the context, you can use alternatives like "i believe so", "i suppose so", or "i guess so" to express varying degrees of certainty or agreement.

Is it appropriate to use "i think so" in formal writing?

While grammatically correct, "i think so" is generally more suitable for informal conversation. In formal writing, consider using stronger, more confident statements or qualifiers to express your opinion.