Present simple: I attend a special course in English, twice a week
Present progressive: I am attending a special course in English, this week
Present perfect: I have attended a special course in English, twice a week
Past simple: I attended a special course in English, twice a week
Past progressive: I was attending a special course in English, twice a week
Past perfect: I had attended a special course in English, twice a week
Future simple: I will attend a special course in English, twice a week
Future progressive: I will be attending a special course in English, twice a week
Future Perfect: I will have attended a special course in English, twice a week