Expert for the forms of the irregular verbs and the pronunciation of the so-called regular verbs,which of course must be memorized (there is no other way),the verbs tenses have been presented in pairs.In this way it is hoped that the student doing these tests will be able to create rules for himself as he tests what he has already studied at school.The questions,therefore,have been created not to trick,but to point out meanings.In other words,we hope that while you test your English to see that you should review,you will also be learning more about English by yourself.