The download button opens the iTunes App Store, where you
may continue the download process. You must have iTunes installed with an
active iTunes account in order to download and install the software. This
download may not be available in some countries.
Study the English irregular verbs.Learn Iverbs allows to create a list of verbs to be studied on base of the complete list of the irregular verbs."To study", show the screen of questions, guess the answers, then show the screen of answers.