The most common patterns are constrain by something and constrain someone to do something. Other prepositions may appear in separate adverbial phrases rather than as fixed combinations.
Use constrain by for limits or causes, and constrain to for forcing or restricting someone to an action or condition. Phrases with in, for, or within are usually separate context phrases rather than fixed verb-preposition combinations.
These forms are not interchangeable. Choose the construction by meaning, not by which preposition appears most often.
By introduces the force, rule, or condition causing the limitation.
Use to before a verb or condition when someone is restricted or compelled.
Within can introduce a separate phrase describing boundaries or limits.
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.
For rarely follows constrain directly in natural English.
✕ The rules constrained us for speaking freely. ✓ The rules constrained us from speaking freely.Use to before the following verb.
✕ They were constrained remain indoors. ✓ They were constrained to remain indoors.By names the cause of the limitation, while within describes boundaries.
✕ The project was constrained within high costs. ✓ The project was constrained by high costs.Choose the expression that matches the intended meaning.
Paste the complete sentence below. Linguix checks the preposition together with grammar, spelling, punctuation, and style.
Yes. It is common in formal and written contexts.
Yes. You can say something constrains a process or person directly.
Constrained by names the cause of the limitation, while constrained to describes the resulting restriction or action.
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