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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
are to
Grammar usage guide and real-world examplesUSAGE SUMMARY
"are to" is correct and usable in written English.
It is used to indicate a requirement or an obligation. For example: "All employees are to wear a face mask when entering the office."
✓ Grammatically correct
News & Media
Encyclopedias
Science
Formal & Business
Wiki
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
Trials are to come.
News & Media
More are to come.
News & Media
Both are to leave.
News & Media
We are to unpredictable.
News & Media
Ours are to feed.
News & Media
"Our expectations are to win.
News & Media
And they are: to us.
News & Media
Our obligations are to them.
News & Media
Print ads are to follow.
News & Media
Several factors are to blame.
News & Media
House prices are to blame.
News & Media
Expert writing Tips
Best practice
Use "are to" to convey a sense of formal obligation or planned action, particularly in official or formal contexts.
Common error
Avoid using "are to" in casual conversation or informal writing, as it can sound overly stiff or unnatural. Opt for alternatives like "going to" or "will" in those situations.
Source & Trust
88%
Authority and reliability
4.5/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "are to" functions primarily as an auxiliary verb combined with the infinitive marker "to" to express future tense with a sense of obligation, arrangement, or intention. Ludwig's AI confirms the correctness and usability of this structure.
Frequent in
News & Media
67%
Encyclopedias
10%
Formal & Business
8%
Less common in
Science
8%
Wiki
5%
Reference
0%
Ludwig's WRAP-UP
In summary, "are to" is a grammatically correct and frequently used phrase that expresses obligation, future plans, or arrangements. As verified by Ludwig AI, it is most common in news and media, encyclopedias, and formal business contexts. When writing, it is best to use "are to" in formal situations to convey a sense of authority or planned action, while avoiding overuse in casual or informal contexts where alternatives like "will" or "going to" are more appropriate. Remember that while similar to phrases like "is scheduled to" or "must", "are to" carries a distinct nuance of formal planning or external obligation.
More alternative expressions(10)
Phrases that express similar concepts, ordered by semantic similarity:
is scheduled to
Focuses on planned or scheduled events, rather than general obligations.
is required to
Emphasizes a formal or legal obligation.
is meant to
Highlights intention or purpose, often implying a design or expectation.
should
Expresses recommendation or expectation, but can be less forceful than "are to".
must
Indicates a strong obligation or requirement, often more emphatic than "are to".
needs to
Implies a necessity or requirement, often focused on a need.
has to
Indicates obligation, necessity, or compulsion.
will
Indicates future intention or prediction, lacking the sense of obligation.
is going to
Expresses future intention or plan, often more informal.
is bound to
Suggests inevitability or a strong likelihood based on circumstances.
FAQs
How is "are to" used in a sentence?
"Are to" indicates a future action, obligation, or instruction, often in a formal or planned context. For example, "The documents "are to be submitted" by Friday."
What phrases are similar to "are to"?
Alternatives include "is scheduled to", "is required to", or "must", depending on the specific nuance you want to convey.
When should I use "are to" instead of "will" or "going to"?
Use "are to" when emphasizing obligation, formal arrangements, or instructions. "Will" and "going to" are more suitable for simple future predictions or intentions without the same level of formality. For example, "The rules "are to be followed" strictly" is more formal than "The rules will be followed."
Is "are to" interchangeable with "have to"?
While both express obligation, "are to" is generally more formal and often implies an external instruction or planned event. "Have to" is more common for expressing personal necessity or obligation. Therefore, they are not always interchangeable; context matters.
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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
88%
Authority and reliability
4.5/5
Expert rating
Real-world application tested