There are several resources available for practicing tense transformations to help learners improve their understanding and flexibility with changing sentences from one tense to another. Some of these resources include:

1. Grammar Workbooks: Workbooks specifically designed for tense transformations provide structured exercises that focus on transforming sentences from one tense to another. These workbooks often progress in difficulty levels, allowing learners to practice and improve their skills gradually.

2. Online Quizzes: Various websites offer online quizzes that test a learner’s ability to transform sentences between different tenses. These quizzes can provide instant feedback, allowing learners to track their progress and identify areas for improvement.

3. Interactive Websites: Interactive websites like Grammarly, English Page, and Purdue OWL offer interactive exercises and tutorials on tense transformations. These websites provide a dynamic learning environment where learners can practice changing tenses in a variety of contexts.

4. Language Apps: There are several language learning apps, such as Duolingo, Babbel, and Rosetta Stone, that include exercises for tense transformations. These apps use gamified approaches to engage learners and make practicing tense transformations more interactive and enjoyable.

By utilizing these resources, learners can effectively practice tense transformations and enhance their overall proficiency in using different tenses in English sentences.