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Prepositions after verbs

How to use necessitate

Necessitate usually takes a direct object without a preposition. The listed combinations are mostly nonstandard as fixed patterns.

Quick answer

Standard use of necessitate

Necessitate normally means require and is followed directly by a noun phrase. Because of and due to may appear elsewhere in the sentence, but not as fixed complements after necessitate.

The repairs necessitated a full shutdown.
Extra demand necessitated more staff.

Choose the pattern by meaning

These forms are not interchangeable. Choose the construction by meaning, not by which preposition appears most often.

1
necessitate + action

Showing what is required

Use a direct object after necessitate.

The injury necessitated surgery.
2
necessitate by + cause

Nonstandard complement pattern

By is not normally used directly after necessitate as a complement.

The delay was necessitated by bad weather.
3
necessitate because of + reason

Adding a separate reason phrase

Because of can explain a reason elsewhere in the clause.

Changes were necessitated because of new regulations.

See the difference in context

The same subject can take different constructions because each sentence answers a different question.

Construction
Example
Meaning
necessitate by
The change was necessitated by safety concerns.
natural mainly in passive structures
necessitate at
Necessitate at is not a standard pattern.
not idiomatic as a complement
necessitate after
Necessitate after is not standard.
use necessitate something instead
necessitate because
Necessitate because is awkward in standard English.
because usually introduces a full clause
necessitate due
Necessitate due is not standard.
use due to in a separate phrase

Common mistakes

Some combinations appear in real text but do not mean what learners often assume.

Adding an unnecessary preposition

Necessitate usually takes a direct object.

✕ The crisis necessitated for changes. ✓ The crisis necessitated changes.

Using due without to

The fixed phrase is due to.

✕ The repairs were necessitated due safety issues. ✓ The repairs were necessitated due to safety issues.

Quick practice

Choose the expression that matches the intended meaning.

1. The accident necessitated ___ investigation.
2. The delay was necessitated ___ technical problems.
3. The changes were made because ___ new rules.

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Frequently asked questions

Does necessitate need a preposition?

Usually no. It directly takes the thing that is required.

Is necessitated by correct?

Yes. It is common in passive constructions.

Can I use necessitate because?

Not usually. Use because of or rewrite the sentence.

nag, at, nag, for, nag, about "narrate by", "narrate from" or "narrate on"? "navigate to" or "navigate through"? negate by, because, from, in or with? "neglect by" or "neglect in"? negotiate with, for, in, on or by? nestle in, on, between, among or within? nibble on, at, around, as or by? nod in, to, at, with or along? "nominate for" or "nominate by"? "note in", "note for" or "note by"? notice in, by, about, on or to?

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