Enforce usually takes a direct object. By and in can appear near the verb, but they have different grammatical roles.
Use enforce something for the basic pattern: enforce a law, enforce a rule. By is common when explaining the method or in passive structures such as enforced by police. In usually introduces a place and is not a fixed combination with enforce.
These forms are not interchangeable. Choose the construction by meaning, not by which preposition appears most often.
Enforce normally takes a direct object without a preposition.
By introduces the enforcing agent or method.
In usually tells where enforcement happens rather than forming a fixed verb-preposition pattern.
The same subject can take different constructions because each sentence answers a different question.
Some combinations appear in real text but do not mean what learners often assume.
Enforce usually takes a direct object.
✕ They enforced on the policy. ✓ They enforced the policy.By shows the agent or method; in shows location.
✕ The law was enforced in the police. ✓ The law was enforced by the police.By normally appears in passive structures or method phrases.
✕ They enforced by strict inspections the rule. ✓ They enforced the rule by strict inspections.In often functions as a place adjunct.
✓ The rule is enforced in airports.Choose the expression that matches the intended meaning.
Paste the complete sentence below. Linguix checks the preposition together with grammar, spelling, punctuation, and style.
Usually no. Enforce is commonly followed directly by a noun phrase.
Use it in passive sentences or when describing the method of enforcement.
Yes, when in introduces a place or context, not as a fixed verb-preposition combination.
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