Used and loved by millions
Since I tried Ludwig back in 2017, I have been constantly using it in both editing and translation. Ever since, I suggest it to my translators at ProSciEditing.

Justyna Jupowicz-Kozak
CEO of Professional Science Editing for Scientists @ prosciediting.com
when class begins
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "when class begins" is correct and usable in written English.
You can use it to refer to the specific time or moment that a class is scheduled to start. Example: "Please make sure to arrive early when class begins to find a good seat."
✓ Grammatically correct
News & Media
Wiki
Formal & Business
Alternative expressions(3)
Table of contents
Usage summary
Human-verified examples
Expert writing tips
Linguistic context
Ludwig's wrap-up
Alternative expressions
FAQs
Human-verified examples from authoritative sources
Exact Expressions
3 human-written examples
When class begins, pair students and give each pair one of the scenarios.
News & Media
When class begins, students take out their pictures and respond to the following prompt, written on the board prior to class: "Explain what you find attractive about these celebrities.
News & Media
When class begins, clear your mind of everything, except what you are making your body do.
Wiki
Human-verified similar examples from authoritative sources
Similar Expressions
56 human-written examples
When class began, Shipsey explained to his students that because he was deaf, he'd like students to write down their questions.
Science & Research
When classes began, his mother had recently been captured by the rebels.
News & Media
About 100 students returned Sunday, when classes began, to a school where there were once 50 students in each classroom.
News & Media
When classes began a week later, she learned otherwise; they were in the same music theory and listening skills classes, and in the orchestra together.
News & Media
Receiver Kyle Prater, from Hillside, Ill., who had planned to enroll Monday when classes began, opened up his recruitment when Carroll left.
News & Media
The first day of September, often referred to as The Day of Knowledge, is the day when classes begin in schools across the country.
News & Media
Adding to the inconvenience, when classes begin next Wednesday many professors are expected to move their classes off campus to honor the picket line.
News & Media
While the library is expected to reopen to employees tomorrow, it remained unclear whether students would be allowed inside on Wednesday, when classes begin.
News & Media
Expert writing Tips
Best practice
Use "when class begins" to clearly indicate a specific time or condition related to the start of a class session. For example, "Announcements will be made "when class begins"."
Common error
Avoid using "when class begins" if the context doesn't clearly relate to an educational setting or scheduled lesson. It can be confusing if used in unrelated situations.
Source & Trust
85%
Authority and reliability
4.5/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "when class begins" functions as an adverbial clause, specifically a subordinate clause of time. This type of clause modifies the main clause by indicating when the action in the main clause occurs. Ludwig confirms this is a correct and usable phrase.
Frequent in
News & Media
40%
Wiki
30%
Formal & Business
15%
Less common in
Science
5%
Encyclopedias
5%
Reference
5%
Ludwig's WRAP-UP
In summary, the phrase "when class begins" functions as a time-related adverbial clause, setting a condition or trigger point related to the commencement of a class. Ludwig confirms that the phrase is correct and usable in English. It is commonly used in educational, news, and general writing contexts. Alternatives like "at the beginning of class" or "as class starts" can be used to express similar ideas. Remember to use this phrase accurately, ensuring that the context clearly relates to an educational setting. While the expression enjoys general acceptance across multiple sources, the user should always consider alternative expressions depending on formality.
More alternative expressions(6)
Phrases that express similar concepts, ordered by semantic similarity:
at the beginning of class
Focuses on the specific point in time class starts, emphasizing the commencement.
as class starts
Highlights the action of class starting and what happens concurrently.
upon commencement of class
A more formal way to refer to the class start.
once class has begun
Emphasizes the state of class having already started.
at the start of the lesson
Replaces "class" with "lesson", offering a subtle variation in terminology.
when the lecture begins
Substitutes "class" with "lecture", focusing on a more formal setting.
as the session commences
Uses more formal terms "session" and "commences".
when the course starts
Replaces "class" with "course", suggesting a more extended period of study.
from the start of class
Emphasizes duration beginning with the start of class.
once the class is underway
Focuses on the class being already in progress.
FAQs
How can I use "when class begins" in a sentence?
You can use "when class begins" to specify a time or condition related to the start of a class. For example, "Please be seated "when class begins"".
What are some alternatives to "when class begins"?
Alternatives include "at the beginning of class", "as class starts", or "upon commencement of class", depending on the context and desired formality.
Is it correct to say "when class begin" instead of "when class begins"?
No, "when class begin" is grammatically incorrect. The verb should agree with the singular noun "class", so the correct form is "when class begins".
What's the difference between "when class begins" and "after class begins"?
"When class begins" refers to something happening at the exact moment the class starts, while "after class begins" refers to something happening sometime after the class has already started.
Editing plus AI, all in one place.
Stop switching between tools. Your AI writing partner for everything—polishing proposals, crafting emails, finding the right tone.
Table of contents
Usage summary
Human-verified examples
Expert writing tips
Linguistic context
Ludwig's wrap-up
Alternative expressions
FAQs
Source & Trust
85%
Authority and reliability
4.5/5
Expert rating
Real-world application tested