“Too fast” and “to fast” may sound similar when spoken but they have very different grammatical roles. Too fast is the correct expression when you mean that something is moving, happening or being done at an excessive speed. For example “You are driving too fast” means the person is driving at a speed that is higher than appropriate.
To fast can also be grammatically correct, but it has a completely different meaning. Here, fast is a verb meaning to avoid eating, usually for a period of time. For example, “I decided to fast for a day” is correct. Therefore, choosing between “too fast” and “to fast” depends on what you are trying to say.
Quick Answer
Use too fast when you mean “faster than is appropriate” or “at an excessive speed.” Use to fast only when fast is a verb meaning to go without food. In most speed related sentences, too fast is the correct choice.
Why People Confuse “To Fast” and “Too Fast”
The words to and too are pronounced the same in many varieties of English, making them easy to confuse.
However, they have different functions:
- To is commonly used before a verb or to indicate direction.
- Too can mean “more than necessary” or “also.”
When talking about excessive speed, you need too.
The car is going too fast.
When talking about avoiding food, to fast can be correct.
She decided to fast for one day.
Too Fast
Too fast means faster than is appropriate, safe, comfortable, or necessary.
Here, too means “more than is desirable or acceptable.”
Examples
You are walking too fast.
The car is moving too fast.
He speaks too fast for me to understand.
The train is going too fast.
In each sentence, too fast describes excessive speed.
To Fast
To fast is grammatically correct when fast is being used as a verb.
As a verb, fast means to deliberately avoid eating food for a period of time.
For example:
I decided to fast tomorrow.
Here, to is simply the infinitive marker before the verb fast.
Other examples include:
- I plan to fast tomorrow.
- She decided to fast for a day.
- They chose to fast during the event.
- He wants to fast for several hours.
So to fast is not a spelling mistake. It simply has a different meaning from too fast.
Comparison Table
| Phrase | Meaning | Example |
|---|---|---|
| Too fast | At an excessive speed | You are driving too fast. |
| To fast | To avoid eating for a period of time | I plan to fast tomorrow. |
| Too | More than necessary; also | The car is too fast. |
| To | Infinitive marker or direction | I want to fast. |
When to Use “Too Fast”
Use too fast when describing excessive speed.
You can use it for:
- Driving
- Walking
- Running
- Speaking
- Reading
- Moving
- Working
- Learning
- Changing
- Developing
Examples
You are driving too fast.
She runs too fast for me to keep up.
He talks too fast.
The movie moves too fast.
The process is happening too fast.
When to Use “To Fast”
Use to fast when fast is a verb.
Examples
I decided to fast tomorrow.
She wants to fast for a few hours.
He plans to fast during the day.
They agreed to fast together.
The meaning has nothing to do with speed.
10+ Examples of “Too Fast”
- You are driving too fast.
- The car is moving too fast.
- He speaks too fast for beginners.
- She runs too fast for me to catch her.
- The river is flowing too fast.
- The computer is processing the information too fast.
- You are reading too fast.
- The children are growing too fast.
- The changes are happening too fast.
- The train was traveling too fast.
- He walked too fast and left everyone behind.
- The story develops too fast.
Examples of “To Fast”
- I decided to fast tomorrow.
- She plans to fast for a day.
- He wants to fast during the morning.
- They chose to fast together.
- She agreed to fast for several hours.
- He intends to fast during the event.
- I am preparing to fast tomorrow.
- They decided to fast as part of their personal practice.
Common Mistakes
Mistake 1: “You are driving to fast.”
Incorrect when you mean excessive speed:
You are driving to fast.
Correct:
You are driving too fast.
Mistake 2: “He talks too fast” vs “He talks to fast”
The correct sentence is:
He talks too fast.
Here, too means excessively.
Mistake 3: Thinking “to fast” Is Always Wrong
To fast can be correct when fast is a verb.
I want to fast tomorrow.
So you should not automatically assume that every use of “to fast” is incorrect.
Memory Trick
Remember:
TOO = MORE THAN NEEDED
So:
The car is going too fast.
It is going faster than it should.
Remember:
TO + VERB
So:
I want to fast.
Here, fast is the verb.
A simple rule:
Too fast = excessive speed
To fast = to avoid eating
American vs British English
There is no significant difference between American and British English in this distinction.
Both varieties use:
- too fast for excessive speed
- to fast when fast is used as a verb meaning to abstain from food
For example:
You are driving too fast.
is correct in both American and British English.
Similar Expressions
Depending on the meaning, you can use several related expressions.
For Excessive Speed
- too quickly
- excessively fast
- at excessive speed
- faster than necessary
- faster than is safe
Example:
He is driving too quickly.
For Fasting
- to abstain from food
- to go without food
- to refrain from eating
Example:
She decided to abstain from food for a period of time.
Final Verdict
Too fast is correct when you mean faster than appropriate or necessary.
You are driving too fast.
To fast is correct when fast is a verb meaning to deliberately avoid eating.
I plan to fast tomorrow.
So, if you are talking about speed, choose too fast.
FAQs
Is it “to fast” or “too fast”?
For excessive speed, the correct phrase is too fast. To fast is used when “fast” functions as a verb meaning to avoid eating.
Is “to fast” grammatically correct?
Yes. For example, “I decided to fast tomorrow” is grammatically correct.
Is “too fast” one word?
No. Too fast consists of two separate words.
What does “too fast” mean?
“Too fast” means faster than is appropriate, safe, comfortable, or necessary.
What does “to fast” mean?
“To fast” means to deliberately avoid eating for a period of time.
Is “You are driving too fast” correct?
Yes. You are driving too fast is the correct sentence when saying that someone’s driving speed is excessive.
What is the difference between to and too?
To commonly introduces an infinitive or indicates direction, while too can mean “more than necessary” or “also.”
How can I remember “too fast”?
Remember too = more than necessary. If something is moving faster than it should, use too fast.
Remember This
If you mean excessive speed, use:
TOO FAST
If you mean to avoid eating, use:
TO FAST
Too fast = excessive speed.
To fast = to avoid eating.
Conclusion
The choice between to fast and too fast depends completely on meaning. When you are describing something that happens at an excessive speed, too fast is the correct expression. For example “The car is going too fast.”
However, to fast is also grammatically correct when fast is used as a verb meaning to avoid eating for a period of time. For example“ I decided to fast tomorrow.” Remembering these two meanings will help you choose the correct expression every time.
