英語八種時態(tài)一般現(xiàn)在時概念：經(jīng)常、反復發(fā)生的動作或行為及現(xiàn)在的某種狀況。時間狀語：always, usually, often, sometimes, every week (day, year, month), once a week, on Sundays, etc.基本結構：be動詞；行為動詞否定形式：am/is/are+not;此時態(tài)的謂語動詞