This quiz is on the most common English communication and rhetoric functions such as ability, permission, certainty, probability, advice, responding to good news, concession, addition, cause and effect, etc. It's designed for English language learners (ELL students) regardless of their levels of English language proficiency.

Even though its primary focus is for ESL/EFL, native English speakers may also find this app interesting.

This app is and will continue being non-commercial and has no advertising. TESL/TEFL teachers may want to recommend it to their students.

It has been tested successfully on the following devices:
motorola XT615 Android Version 2.3.7
motorola MotoE Android Version 4.4.4
a 7-inch tablet Android Version 4.1.1