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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
if and when
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase 'if and when' is correct and usable in written English.
It is used when an event or situation may or may not happen at a later time. Example sentence: I will be ready to review your report if and when it is completed.
✓ Grammatically correct
News & Media
Wiki
Science
Alternative expressions(20)
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
60 human-written examples
"I don't know if and when".
News & Media
And I'm underlining the if and when".
News & Media
Antarctica decides if and when you will leave.
News & Media
What will happen if and when Mark Sanchez struggles?
News & Media
If and when it goes wrong, most provide support.
News & Media
If and when that happens, Airbus has bigger ambitions.
News & Media
Only Miller knows if and when he will return.
News & Media
If and when will the new businesses make money?
News & Media
It will (or won't) be made if and when necessary".
News & Media
"If and when it gets taken back, what happens?
News & Media
We'll update you if and when there is.
News & Media
Expert writing Tips
Best practice
Use "if and when" to clearly express that an action or event is dependent on a condition that may or may not occur. This helps to avoid ambiguity in your writing.
Common error
Avoid using "if and when" in situations where a simple "if" would suffice. Overusing it can make your writing sound redundant and less concise.
Source & Trust
84%
Authority and reliability
4.5/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "if and when" functions as a conjunction, introducing a conditional clause that depends on both the occurrence of an event ('if') and the timing of that event ('when'). As Ludwig AI points out, the phrase is grammatically correct and commonly used.
Frequent in
News & Media
50%
Wiki
18%
Science
10%
Less common in
Formal & Business
7%
Encyclopedias
3%
Reference
2%
Ludwig's WRAP-UP
The phrase "if and when" is a grammatically sound and commonly used conjunction to express a dependency on both the occurrence and timing of an event. Ludwig AI confirms its correctness and usability. While versatile, it's essential to use it judiciously, avoiding overuse in simple conditional sentences. Alternatives like "in the event that" or "contingent upon" can offer more formal or specific nuances. Its prevalence in news, wiki, and scientific sources reflects its widespread acceptance across various communication styles, making it a valuable tool for clear and precise writing.
More alternative expressions(10)
Phrases that express similar concepts, ordered by semantic similarity:
when and if
Reverses the order of the conditions, slightly changing the emphasis.
in the event that
More formal and emphasizes the possibility of a specific event occurring.
contingent upon
Highlights the dependence of one event on another's occurrence.
on the condition that
Explicitly states a requirement for a particular outcome.
should the occasion arise
More formal and suggests a specific opportunity or situation.
provided that
Similar to "on the condition that", but slightly less formal.
depending on whether
Indicates a decision or action that will vary based on a future circumstance.
assuming that
Introduces a condition that must be true for something else to happen.
in case
Shorter and more general, indicating a preparation for a possible event.
if it happens
Simple and direct, focusing on the uncertainty of the event.
FAQs
How can I use "if and when" in a sentence?
Use "if and when" to indicate that something will happen only under a specific condition and at a specific time. For example, "We will proceed with the project if and when we secure the necessary funding."
What is a good alternative to "if and when"?
Depending on the context, you can use alternatives such as "in the event that", "should the occasion arise", or "contingent upon".
Is it redundant to use both "if" and "when"?
While "if" and "when" can sometimes be used interchangeably, "if and when" emphasizes that both a condition and a time must be met for something to occur. It's not always redundant, but consider whether the added emphasis is necessary for clarity.
What's the difference between "if" and "if and when"?
"If" introduces a general condition. "If and when" specifies that something will happen only when a particular condition is met at a specific time. The latter adds a sense of timing or certainty to the condition.
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Table of contents
Usage summary
Human-verified examples
Expert writing tips
Linguistic context
Ludwig's wrap-up
Alternative expressions
FAQs
Source & Trust
84%
Authority and reliability
4.5/5
Expert rating
Real-world application tested