【正文】
At that time, people did not know that the earth moves. He told me last week that he is eighteen. 2) 賓語從句中的助動詞 ought, need, must, dare 時態(tài)是不變的。 2) 漸變動詞,如: get, run, grow, bee, begin及die。s army now advances and the great battle begins. 一般現(xiàn)在時代替完成時 1) 有些動詞用一般現(xiàn)在時代替完成時: hear, tell, learn, write , understand, fet, know, find , say, remember. I hear (= have heard) he will go to London. I fet (=have fotten) how old he is. 2) 句型 It is … since… 代替 It has been … since … 3) It is (= has been) five years since we last met. 3 一般現(xiàn)在時代替進行時 1) 句型: Here es… ; There goes… Look, here es Mr. Li. 4 現(xiàn)在進行時代替將來時 1) 表示即將發(fā)生的或預定中計劃好的活動。 2) 敘述往事,使其生動。 The newspaper says that it39。 2) 過去進行時的主要用法是描述一件事發(fā)生的背景;一個長動作發(fā)生的時候,另一個短動作發(fā)生。s getting warmer and warmer. d. 與 always, constantly, forever 等詞連用,表示反復發(fā)生的動作或持續(xù)存在的狀態(tài),往往帶有說話人的主觀色彩。 ) She is learning piano under Mr. Smith. c. 表示漸變的動詞有: get, grow, bee, turn, run, go, begin等。 We are waiting for you. b. 習慣進行:表示長期的或重復性的動作,說話時動作未必正在進行。 b. 動作完成:表示將來某一時或另一個將來的動作之前,已經(jīng)完成的動作或一獲得的經(jīng)驗。 When she saw the mouse, she screamed. My aunt gave me a hat and I lost it. 2 ) 兩個動作相繼發(fā)生,可用一般過去時;如第一個動作需要若干時間完成,用過去完成時。t. 3) 過去完成時的時間狀語 before, by, until , when, after, once, as soon as。 She said (that) she had never been to Paris. b. 狀語從句 在過去不同時間發(fā)生的兩個動作中,發(fā)生在先,用過去完成時;發(fā)生在后,用一般過去時。 I have been here since 1989. 2) since +一段時間 + ago I have been here since five months ago. 3) since +從句 Great changes have taken place since you left. Considerable time has elapsed since we have been here. 4) It is +一段時間 + since從句 It is two years since I became a postgraduate student. 14 延續(xù)動詞與瞬間動詞 He has joined the army. He has been in the army for three years. He has married. He has been married for two hours. 15 過去完成時 1) 概念:表示過去的過去 || | 其構成是 had +過去分詞構成。 ) I have worked here for many years. (現(xiàn)在我仍在這里工作。 I have lived here for more than twenty years. I