Practise in and practise by are both correct, but they express different ideas. Practise in refers to an area or field, while practise by introduces a method.
Use practise in for a subject, skill area, or profession. Use practise by before the activity or method used for training.
These forms are not interchangeable. Choose the construction by meaning, not by which preposition appears most often.
Use practise in with professions, disciplines, or organised activities.
Use practise by before a gerund to explain the method used for improvement.
Practise often takes a direct object such as a skill, move, or language.
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.
By is usually followed by an activity or gerund.
✕ She practised by conversation. ✓ She practised by having conversations.Use in for areas and by for techniques.
✕ He practises by corporate law. ✓ He practises in corporate law.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 yes. It is commonly followed by a gerund such as by reading or by repeating.
Yes. It can refer to the setting of practice, as in practise in groups or practise in class.
In British English, practise is the verb and practice is usually the noun.
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