Common Mistakes When Using ‘kind of’ in a Sentence

The phrase “kind of” is one of the most frequently misused expressions in everyday English. The core problem is that learners often confuse its role as a vague qualifier (meaning “somewhat” or “a little”) with its proper use as a noun phrase meaning “a type of” or “a variety of.” This confusion leads to grammatically incorrect sentences, unclear meaning, and an overly informal tone in writing where precision is expected. This guide will show you exactly how to use “kind of” correctly, when to avoid it, and what to use instead.

Quick Answer: When Is “Kind of” Correct?

Use “kind of” in two main ways:

• As a noun phrase (correct in all contexts): “This is a kind of fruit I have never tried.” Here, “kind of” means “type of.” It is grammatically correct and works in formal and informal English.
• As a vague qualifier (informal only): “I am kind of tired.” Here, “kind of” means “somewhat” or “a little.” This use is common in conversation but is too informal for most writing, emails, or academic work.

The most common mistake is using the vague qualifier “kind of” in formal writing or when a more precise word is needed. Another frequent error is forgetting the article “a” before “kind of” when it is used as a noun phrase.

Understanding the Two Meanings of “Kind of”

To avoid mistakes, you must first understand that “kind of” has two distinct functions. They are not interchangeable.

1. “Kind of” as a Noun Phrase (Type of)

In this use, “kind of” is a noun phrase. It is always preceded by an article like “a,” “the,” or “this.” It refers to a specific category, class, or variety. This use is grammatically correct in all registers, from casual conversation to formal reports.

• Correct: “What kind of coffee do you prefer?”
• Correct: “That is a strange kind of behavior.”
• Correct: “We need to decide on the kind of software we will use.”

Notice that “kind of” is followed by a noun (coffee, behavior, software). This is the standard structure.

2. “Kind of” as a Vague Qualifier (Somewhat)

In this use, “kind of” is an adverb phrase. It modifies an adjective or verb and means “to some extent” or “a little.” This use is very common in spoken English but is considered informal. It is often used to soften a statement or express uncertainty.

• Informal: “I am kind of hungry.” (Meaning: I am a little hungry.)
• Informal: “She kind of likes the idea.” (Meaning: She likes it to some degree.)
• Informal: “It is kind of cold outside.” (Meaning: It is slightly cold.)

The problem arises when learners use this informal “kind of” in writing, emails, or formal presentations. It can make your English sound hesitant, vague, or unprofessional.

Comparison Table: Noun Phrase vs. Vague Qualifier

Natural Examples of Correct Usage

Here are examples that show both uses in realistic sentences. Pay attention to the context.

• Noun phrase (correct): “I need to find out what kind of paint is safe for the baby’s room.”
• Noun phrase (correct): “She has a unique kind of talent that is hard to describe.”
• Vague qualifier (informal, conversation): “I am kind of hoping the meeting ends early.”
• Vague qualifier (informal, conversation): “He was kind of rude to the waiter, don’t you think?”
• Noun phrase (correct): “The teacher explained the kind of essay we need to write.”

Common Mistakes and How to Fix Them

Below are the three most frequent errors learners make with “kind of.” Each mistake includes a correction and an explanation.

Mistake 1: Using the Vague Qualifier in Formal Writing

Incorrect: “The results were kind of disappointing.”
Correct (formal): “The results were somewhat disappointing.” or “The results were slightly disappointing.”
Why: In a report, email, or academic paper, “kind of” sounds too casual. Use “somewhat,” “slightly,” “rather,” or “moderately” instead.

Mistake 2: Forgetting the Article “a” Before “Kind of”

Incorrect: “This is kind of flower I like.”
Correct: “This is a kind of flower I like.”
Why: When “kind of” means “type of,” it is a noun phrase and needs an article. Without “a,” the sentence is ungrammatical.

Mistake 3: Using “Kind of” with a Plural Noun Incorrectly

Incorrect: “These kind of problems are difficult.”
Correct: “This kind of problem is difficult.” or “These kinds of problems are difficult.”
Why: “Kind” is singular, so it must match a singular verb and noun. If you are talking about multiple types, use “kinds” with a plural verb.

Better Alternatives to “Kind of” (Vague Qualifier)

If you are writing an email, a report, or any formal document, avoid the vague qualifier “kind of.” Here are precise alternatives for different situations.

• For degree (slightly): “I am slightly tired.” (Better than “kind of tired”)
• For degree (moderately): “The project is moderately complex.” (Better than “kind of complex”)
• For uncertainty (hedging): “The proposal seems feasible.” (Better than “kind of works”)
• For softening a statement: “I am a little concerned about the deadline.” (Better than “kind of concerned”)
• For a direct statement: “I am not fully convinced.” (Better than “I kind of agree”)

In conversation, “kind of” is acceptable. In writing, choose a more specific word to sound clear and confident.

When to Use “Kind of” (And When to Avoid It)

Use “kind of” when:

• You are speaking casually with friends or family.
• You want to soften a statement in a friendly conversation.
• You are using it as a noun phrase (type of) in any context.

Avoid “kind of” when:

• You are writing a formal email, report, or academic paper.
• You need to be precise and clear.
• You are describing facts or data.
• You are speaking in a professional setting, like a meeting or presentation.

Mini Practice: Test Your Understanding

Choose the correct or better option for each sentence. Answers are below.

1. Which sentence is correct for a formal email?
a) The budget is kind of tight this quarter.
b) The budget is somewhat tight this quarter.

2. Which sentence is grammatically correct?
a) This is kind of music I enjoy.
b) This is a kind of music I enjoy.

3. Which sentence is correct?
a) These kind of errors are common.
b) This kind of error is common.

4. Which sentence is appropriate for a casual conversation?
a) I am kind of hungry right now.
b) I am moderately hungry right now.

Answers:
1. b) “Somewhat” is more formal and appropriate for email.
2. b) “A kind of” is the correct noun phrase structure.
3. b) “This kind” is singular and matches the singular noun “error.”
4. a) “Kind of” is natural in casual conversation. “Moderately” sounds too formal.

Frequently Asked Questions

1. Is “kind of” always informal?

No. When “kind of” means “type of” (as in “a kind of fruit”), it is neutral and can be used in formal writing. Only the vague qualifier meaning (“somewhat”) is informal.

2. Can I use “sort of” the same way as “kind of”?

Yes. “Sort of” has the same two functions and the same rules. “A sort of” is a noun phrase, and “sort of” as a vague qualifier is informal. The advice in this article applies to both.

3. What is the difference between “kind of” and “type of”?

In most cases, they are interchangeable when used as noun phrases. “Kind of” is slightly more general, while “type of” can sound more technical. For example, “What kind of music do you like?” and “What type of music do you like?” are both correct.

4. How do I fix a sentence where I used “kind of” too much?

Read your sentence aloud. If “kind of” sounds hesitant or vague, replace it with a more precise word. For example, change “I am kind of interested” to “I am interested” or “I am somewhat interested” depending on the level of formality you need.

For more help with common usage mistakes, visit our Common Usage Mistakes section. You can also explore Simple Sentence Examples and Daily English Sentences for additional practice. If you have questions, check our FAQ or contact us.