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1、1. 一般现在时 结构：主语+谓语（be, 行为动词）am, is, are是否需要用是否需要用第三人称单第三人称单数数是否第三人称单数常用的标志词：every day, often.1. She (be) a student.2. She (go) to school by bike every day.isgoes2. 一般过去时 结构：主语+谓语（be, 行为动词）was, were动词的过去式常用时间状语：yesterday, last week, two days ago.1. They (be) students two years ago.2. He (go) to the pa
2、rk yesterday.werewent3. 现在进行时 结构：be+ doing（动词的ing)am, is, are常用标志词：now, at this moment1. Daming (play) basketball now.2. We (watch) TV at the moment.is playing are watching 4. 过去进行时 结构：be+ doing（动词的ing）was, were常用时间状语：at 6 oclock yesterday, at this time last week1. Linda (do) her homework at 11 oclo
3、ck yesterday morning. 2. Toms parents (do) the housework at this time last week.was doingwere doing5. 一般将来时 结构：will+ do（动词原形）常用时间状语：tomorrow, in the future, in two daysShe (go) to the supermarket tomorrow.will go6. 现在完成时 结构：has/have done（动词的过去分词）常用标志词：already, just, ever, neveryet, before1. Betty already (finish) her homework.2. Betty and Daming (read) this book before.hasfinishedhave read