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去看電影。如: Her mother is going to buy her a new bike. 她媽媽要給她買輛新自行車。如: It39。
句中的動詞是一般現(xiàn)在時(shí),但所表示的意義卻是一般將來時(shí)。如: Please tell him to go when he es. 他來時(shí),就讓他去。 如: We are leaving tomorrow 。 例A:He worked very hard last year. (去年他很用功。) 例C:They were here only a few minutes ago. (幾分鐘前他們還在這里。這些常用于修飾一般過去時(shí)的副詞有:yesterday, yesterday morning (afternoon, evening ), just now (剛才), before (以前) , then (at that time ) (當(dāng)時(shí)) , last +時(shí)間 (如 last week, month, year, Monday, … January, … spring, …, etc. ), that +時(shí)間 (如 that day, afternoon, summer, …, etc. ), 時(shí)間 + ago (如 a few minutes ago, two weeks ago , years ago, … etc.) 二、一般過去時(shí)的主要語法功能: 1. 表示過去發(fā)生的動作或情況, 過去時(shí)間可以由狀語或上下文表示出來:? . He returned home very late last night. 他昨晚很晚回家。 他常常在午夜后才關(guān)電視。 . She often swam/ went swimming last summer. 去年夏天她經(jīng)常去游泳。 3. 可用在said, reported等后面的間接引語中,代替一般現(xiàn)在時(shí)。m tired of his long speech.She said that she was tired of his long speech. 她說她煩透了他的長篇大論。 4. 用在時(shí)間和條件狀語從句中,代替過去將來時(shí)。 He said she would lose her temper if she knew the truth. 他說如果她知道真相會發(fā)脾氣的。 . A: I39。你說什么? A: Her name is Mary. B: What was her name?她名叫瑪麗。固比液氣傳聲快,真空不能傳播聲。感知聲音兩途徑,雙耳效應(yīng)方向明。分貝強(qiáng)弱要注意,樂音也能變噪聲。聲音大小叫響度,響度大小看振幅。聲音高低叫音調(diào),頻率高低調(diào)不同。同一音調(diào)樂器多,想要區(qū)分靠音色,只聞其聲知其人,音色不同傳信息。超聲次聲聽不到,回聲測距定位妙。二、光學(xué)發(fā)光物體叫光源,描述路徑有光線;直線傳播有條件,同種介質(zhì)需均勻;月亮本不是光源,長度單位有光年;傳光最快數(shù)真空,8分能飛到月宮。光線原以直線過,遇到界面成反射;一面兩角和三線,法線老是在中間;反射類型有兩種,成像反射靠鏡面;學(xué)生坐在各角落,看字全憑漫反射;若是個別有“反光”,那是鏡面幫倒忙。鏡面反射成虛像,像物同大都一樣,物遠(yuǎn)像遠(yuǎn)沒影響,連線垂直鏡中央.觀后鏡使光發(fā)散,擴(kuò)大視野任車轉(zhuǎn)。不管凸透凹透