must be replaced

USAGE SUMMARY

The phrase "must be replaced" is correct and usable in written English.
You can use it when something needs to be replaced due to being worn out or no longer functional. For example: "The outdated computer must be replaced with a new model."

✓ Grammatically correct

News & Media

Science

Wiki

Human-verified examples from authoritative sources

Exact Expressions

60 human-written examples

They also must be replaced after use.

The New York Times

"But the roof must be replaced.

The New Yorker

President Bush says Arafat must be replaced.

The New York Times

The transfer case must be replaced.

The New York Times

Train cars and buses must be replaced.

The Washington Post

Periodically, worn or broken couplings must be replaced.

Maintenance Fundamentals

Still, he said the building must be replaced.

The New York Times

She says the Press Complaints Commission must be replaced.

The Guardian

Each pine log must be replaced every three days.

The Economist

Cone was supposed to pitch Tuesday, and must be replaced.

The New York Times - Sports

Moreover, prostheses need regular maintenance and eventually must be replaced.

The New York Times

Expert writing Tips

Best practice

When using "must be replaced", ensure that the context clearly indicates what the replacement should be and why it is necessary. Specificity enhances clarity and prevents ambiguity.

Common error

Avoid using "must be replaced" without clearly specifying what needs replacement. For example, instead of saying "The item must be replaced", specify "The faulty engine must be replaced with a new one" to provide better context.

Linguistic Context

The phrase "must be replaced" functions as a modal passive construction, indicating a strong necessity or obligation for something to be substituted. This grammatical structure is commonly used to express that an action is required. Ludwig AI confirms this through numerous examples.

Expression frequency: Very common

Frequent in

News & Media

49%

Science

30%

Wiki

12%

Less common in

Encyclopedias

2%

Formal & Business

7%

Reference

0%

Ludwig's WRAP-UP

The phrase "must be replaced" is a common and grammatically correct expression used to indicate a strong necessity for substitution or renewal. Ludwig AI confirms its validity and widespread usage across various contexts, including News & Media, Science, and Wiki sources. When using this phrase, ensure that the subject requiring replacement is clearly identified to avoid ambiguity. While slightly more formal than alternatives like "needs to be replaced", it effectively conveys the urgency and importance of the substitution.

More alternative expressions

Phrases that express similar concepts, ordered by semantic similarity:

needs to be substituted

Emphasizes the requirement for substitution due to inadequacy or failure. The difference is that is focuses in the concept of 'needs' something.

is due for replacement

Highlights that something is at the end of its life cycle and has reached a point where substitution is expected.

has to be exchanged

Highlights the obligation for an exchange, implying a direct swap for something else. Is less formal.

necessitates substitution

It is an alternative highlighting that the substitution is not just a matter of will, but of necessity.

is required to be renewed

Focuses on the renewal aspect, suggesting a cyclical or periodic replacement is necessary. Is more specific.

calls for a substitution

This alternative suggests that there is an explicit action or request to make the substitution.

should be superseded

Indicates that something should be replaced because it is outdated or obsolete. Highlights the obsolescence.

demands a replacement

Highlights the fact that the urgency of the replacement is very relevant.

ought to be substituted

Suggests a moral or advisory necessity for replacement, implying a recommendation. Less common.

warrants a replacement

This alternative highlights that something makes the substitution a reasonable action.

FAQs

How do I use "must be replaced" in a sentence?

Use "must be replaced" to indicate a strong necessity for something to be substituted, often due to damage, obsolescence, or failure. For instance, "The worn tires "must be replaced" before the next trip".

What are some alternatives to "must be replaced"?

Alternatives include "needs to be substituted", "has to be exchanged", or "is due for replacement", depending on the specific context and nuance you want to convey.

Is it more formal to say "must be replaced" or "needs to be replaced"?

"Must be replaced" tends to be slightly more formal and emphatic compared to "needs to be replaced", which is more neutral. The choice depends on the tone and audience of your writing.

What is the difference between "should be replaced" and "must be replaced"?

"Must be replaced" indicates a higher degree of necessity or obligation than "should be replaced". While "should be replaced" suggests a recommendation, ""must be replaced"" implies that the replacement is essential or unavoidable.