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he beginning of, at the end of,at half past five,at night,in a week,in the morning,in class,at sunrise, in spring/summer/autumn/winter,on Sunday,on Saturday afternoon,on a winter evening,for a long time,for two months,after school,since liberation,before lunch,at the time of,at the age of。 表示地點的介詞及介詞短語?in,at,into,to,on,beside,before,behind,above,under,outside,inside,up,from,far,from,near,across, off, down, among, past,between,out of,around,in the front of, in the middle of, at the back of,at the foot of,at home,at the gate,at the table,in the sky, on the ground,in a tree, in the south,in the sun,in the bed,on one’s way home,by the side of。2九種基本時態(tài)▊ 概念: 表示經(jīng)常發(fā)生的動作或經(jīng)常存在的狀態(tài)。常和 always , often , usually , sometimes , every day 等表時間的狀語連用。如:1) I go to school every day . 我每天都去學校。(表經(jīng)常)2) He is always like that . 他總是那樣。 (表狀態(tài))構成: 1) 主語 + be (am / are / is ) +……2) 主語 + 實義動詞 + …▊ 概念: 1) 表示過去某個時間發(fā)生的動作或存在的狀態(tài).常和表示過去的時間狀語連用. 如: yesterday , last week , in 1998 , two days ago等.如: I went to a movie yesterday. 我昨天去看了一場電影.2) 也可表示過去經(jīng)?;蚍磸桶l(fā)生的動作.如: He always went to work by bike last week.構成: 1) 主語 + be (was / were ) +……2) 主語 + 實義動詞過去式 +▊ 概念: 表示現(xiàn)在(說話瞬間)正在進行或發(fā)生的動作.如: He is singing.They are watching TV now.構成: 主語 + 助動詞be(am/are/is) + 動詞ing形式構成.▊ 概念: 表示過去某一時刻或某一段時間正在進行的動作. 這一特定的過去時間除了有上下文暗示外,一般用時間狀語來表示.如: 1) What were you doing?I was jumping.2) What was the boy doing when the UFO arrived?He was sleeping.構成: 主語 + 助動詞be(was/were) + 動詞ing形式構成.▊ 概念: 表示將來某個時間要發(fā)生的動作或存在的狀態(tài),也表示將來經(jīng)?;蚍磸桶l(fā)生的動作,常與表示將來的時間狀語連用,如: tomorrow, next week, next year, in the