Задание Поставить глагол-сказуемое одного предложения из текста во все временные формы (Present, Past, Future) групп Continuous и Perfect в страдательном залоге
 Ideally, the curriculum of a comprehensive high school  would include at least four years of English and American literature, three years of social studies, two  of mathematics, one year of science, ect. 

Ideally, at least four years of English and American literature, three years of social studies, two of mathematics, one year of science, etc. ___ in the curriculum of a comprehensive high school. Continuous: 1) Present: are being included 2) Past: were being included 3) Future ––– Perfect: 1) Present: have been included 2) Past: had been included 3) Future – will have been included