توضیحات:

To use Modal Verbs correctly is a must for every English language learner. Here is an app which offers detailed grammatical notes on English modal verbs' usage, and 2 quizzes to practice them.

The first quiz, with 20 items chosen randomly from a set of more than 60 items, tests your ability to recognise the function a modal expresses. The second quiz, with 20 items chosen randomly from a set of more than 100 items, tests your ability to use modal verbs correctly.
It's designed for English language learners (ELL students) regardless of their levels of English language proficiency.

TESL/TEFL teachers may want to recommend it to their students.

It has been tested successfully on a variety of handheld devices.