Common Mistakes When Using ‘kind of’ in a Sentence

The most common mistake with “kind of” is using it as a vague filler in formal writing when a precise word would be better. Many learners also confuse “kind of” with “kinds of” and misuse it in negative sentences. This guide explains exactly how to use “kind of” correctly in everyday English, email, and conversation, with clear examples and common errors to avoid.

Quick Answer: When to Use ‘Kind of’

Use “kind of” in two main ways: (1) to mean “a type of” (e.g., “This is a kind of fruit”) and (2) as an informal adverb meaning “somewhat” or “a little” (e.g., “I am kind of tired”). In formal writing, avoid the second use and choose a more precise word like “somewhat” or “rather.”

Understanding the Two Meanings of ‘Kind of’

“Kind of” has two distinct uses that often cause confusion. The first is literal and refers to a category or type. The second is idiomatic and softens a statement.

1. ‘Kind of’ Meaning ‘A Type of’

This is the original, literal meaning. You use it to say something belongs to a category. It is correct in both formal and informal English.

• “A penguin is a kind of bird.”
• “She bought a new kind of coffee.”
• “This is a strange kind of behavior.”

Note: When the noun after “kind of” is singular, use “a kind of.” When it is plural or uncountable, you often use “kinds of” to refer to multiple types.

2. ‘Kind of’ as an Adverb Meaning ‘Somewhat’

This is the informal, conversational use. It means “to some extent” or “a little.” It is very common in spoken English but is considered too casual for most formal writing.

• “I am kind of hungry.” (I am a little hungry.)
• “That movie was kind of boring.” (It was somewhat boring.)
• “She kind of likes him.” (She has some interest.)

In formal emails, reports, or academic writing, replace “kind of” with “somewhat,” “rather,” “slightly,” or “to some extent.”

Comparison Table: Formal vs. Informal Use

Common Mistakes with ‘Kind of’

Here are the most frequent errors learners make and how to fix them.

Mistake 1: Using ‘Kind of’ Instead of ‘Kinds of’

When you talk about multiple types, use “kinds of” (plural). Using “kind of” with a plural noun is a common error.

Incorrect: “There are many kind of animals in the zoo.”
Correct: “There are many kinds of animals in the zoo.”

Incorrect: “She likes all kind of music.”
Correct: “She likes all kinds of music.”

Mistake 2: Using ‘Kind of’ in Formal Writing

Using “kind of” to mean “somewhat” makes your writing sound vague and unprofessional.

Weak (informal): “The project was kind of successful.”
Strong (formal): “The project was moderately successful.”

Weak: “We are kind of concerned about the budget.”
Strong: “We are somewhat concerned about the budget.”

Mistake 3: Overusing ‘Kind of’ as a Filler Word

In conversation, some people say “kind of” too often. It can make you sound unsure or hesitant.

Overused: “I kind of think we should kind of wait and kind of see what happens.”
Better: “I think we should wait and see what happens.”

Mistake 4: Confusing ‘Kind of’ with ‘Sort of’

“Kind of” and “sort of” are very similar and often interchangeable in informal English. However, “sort of” can sound slightly more British or old-fashioned. The main mistake is using them in the wrong context. Stick to “kind of” for American English conversation and “sort of” if you prefer a slightly softer tone.

Natural Examples of ‘Kind of’ in Sentences

Here are natural-sounding examples for different situations.

In Casual Conversation

• “I am kind of tired after the long walk.”
• “That restaurant is kind of expensive, but the food is good.”
• “She kind of forgot to call me back.”
• “It is kind of late to start a new project now.”

In Emails (Informal to Semi-Formal)

• “I am kind of stuck on this task. Can you help?” (Acceptable in a casual team email.)
• “The deadline is kind of tight, but I will try my best.” (Better: “The deadline is somewhat tight.”)
• “We are kind of hoping for a quick response.” (Better: “We would appreciate a quick response.”)

In Describing Categories

• “This is a new kind of software for designers.”
• “What kind of music do you listen to?”
• “That is a dangerous kind of behavior.”
• “I need a different kind of solution.”

Better Alternatives to ‘Kind of’

When you want to sound more precise or formal, replace “kind of” with these words.

• Somewhat: “I am somewhat disappointed.” (More formal than “kind of.”)
• Rather: “It is rather cold today.” (Slightly stronger than “somewhat.”)
• Slightly: “The price is slightly higher.” (More precise.)
• To some extent: “The plan worked to some extent.” (Very formal.)
• A bit: “I am a bit busy.” (Informal but natural.)

When to Use ‘Kind of’ (and When to Avoid It)

Use “kind of” freely in these situations:

• Casual conversations with friends or family.
• Informal text messages or social media posts.
• When you want to soften a statement (e.g., “I kind of disagree” is gentler than “I disagree”).

Avoid “kind of” in these situations:

• Formal emails to clients, managers, or professors.
• Academic essays, research papers, or reports.
• Professional presentations or speeches.
• Any writing where clarity and precision are important.

Mini Practice: Test Your Understanding

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

1. There are many _____ flowers in the garden.
A) kind of
B) kinds of
C) kind a of

2. In a formal email, which sentence is better?
A) “We are kind of sorry for the mistake.”
B) “We apologize for the mistake.”

3. What does “kind of” mean in this sentence: “I am kind of hungry”?
A) I am very hungry.
B) I am a little hungry.
C) I am not hungry at all.

4. Which word is a good formal replacement for “kind of”?
A) Really
B) Somewhat
C) Totally

Answers: 1. B, 2. B, 3. B, 4. B

Frequently Asked Questions

Is ‘kind of’ grammatically correct?

Yes, “kind of” is grammatically correct in both its meanings. The literal meaning (“a type of”) is always correct. The adverbial meaning (“somewhat”) is correct in informal English but should be avoided in formal writing.

Can I use ‘kind of’ in a negative sentence?

Yes, but be careful. “I am not kind of tired” is incorrect. Instead, say “I am not really tired” or “I am not that tired.” Use “kind of” only in positive or neutral statements, like “I am kind of not sure” (informal but acceptable).

What is the difference between ‘kind of’ and ‘type of’?

They are very similar and often interchangeable. “Kind of” is slightly more general and informal. “Type of” is more specific and can sound more technical. For example, “a kind of fruit” is general; “a type of apple” is more specific.

How do I teach ‘kind of’ to English learners?

Start with the literal meaning (“a kind of animal”). Then introduce the informal adverbial meaning (“kind of tired”) with plenty of examples. Emphasize that the second meaning is for conversation only. Use a comparison table to show formal alternatives.

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 further questions, check our FAQ page or contact us.