so must

USAGE SUMMARY

The phrase "so must" is correct and usable in written English.
It is used to express a logical conclusion: If the water is cold, then I must put on a jacket; so must you.

✓ Grammatically correct

News & Media

Science

Academia

Human-verified examples from authoritative sources

Exact Expressions

59 human-written examples

So must every Pakistani.

The New York Times

But then, so must he.

The New York Times

So must we.

The Guardian - Opinion

So must companies.

The Guardian - Tech

So must their companies.

The Guardian - Opinion

So must Israel.

The New York Times

And so must we.

The Guardian - Lifestyle

So must one suffer to be happy?

The New York Times

So must averting war with Iran.

The New York Times

So must you keep taking them?

The Guardian - Lifestyle

Human-verified similar examples from authoritative sources

Similar Expressions

1 human-written examples

So it must be so.

The New York Times

Expert writing Tips

Best practice

Use "so must" to efficiently indicate that a previously stated action or condition also applies to another subject. This avoids repetition and adds a touch of formality.

Common error

Avoid inverting the subject and auxiliary verb after "so must" when it follows a negative statement. For example, instead of "He doesn't like coffee, so must I," the correct structure is "He doesn't like coffee, nor must I."

Linguistic Context

The phrase "so must" functions as an adverbial phrase indicating agreement or a parallel requirement. Ludwig AI affirms its correctness. The structure allows for concise expression of shared obligations or conditions, enhancing sentence flow by avoiding direct repetition.

Expression frequency: Very common

Frequent in

News & Media

68%

Science

15%

Academia

7%

Less common in

Wiki

5%

Formal & Business

3%

Reference

2%

Ludwig's WRAP-UP

In summary, "so must" is a correct and frequently used adverbial phrase that concisely expresses agreement or parallel necessity. Ludwig AI confirms its grammatical status. Predominantly found in news and media, it also appears in scientific and academic contexts. It is valuable to use "so must" to prevent unnecessary repetition and keep a natural sentence flow. While it's key to keep in mind the importance of subject-verb agreement when using this phrase.

More alternative expressions

Phrases that express similar concepts, ordered by semantic similarity:

likewise should

Replaces "must" with "should", softening the sense of obligation while maintaining the parallel structure.

similarly required

Substitutes "must" with "required", emphasizing necessity in a more formal tone.

the same applies

Conveys the same idea of applicability but uses a more general and less emphatic construction.

equally imperative

Replaces the entire structure with an adjectival phrase highlighting the importance.

it too is necessary

Uses a more descriptive phrase to express the same necessity, adding a slight emphasis on 'it'.

also essential

Simplifies the structure using "also" and "essential" to convey the necessity.

the same is true

Indicates agreement or parallel situation in a broad, less forceful way.

this also holds

Suggests that a previously stated condition or rule is applicable in the current case as well.

and therefore also

Adds an element of logical consequence to the agreement, making it slightly more formal.

subsequently needed

Expresses the requirement as a result of something else, emphasizing the sequential aspect.

FAQs

How can I use "so must" in a sentence?

Use "so must" to indicate that what is true or necessary for one subject is also true or necessary for another. For example, "If they finish the report, "so must we"".

What does "so must" mean?

"So must" indicates agreement or necessity, implying that a previous condition or action applies equally to another subject.

Which is correct, "so must I" or "so I must"?

"So must I" is the correct structure, using inversion to show agreement or parallel necessity with a previous statement.

Are there alternatives to using "so must" in a sentence?

Yes, you can use alternatives like "likewise should", "similarly required", or "the same applies" depending on the specific context and level of formality.