1、Present Continuous Tense -现在进行时,教学重、难点：1、现在进行时的构成、运用及巩固。 2、现在分词的构成。,知识要点： 一、现在进行时的定义：现在进行时是表示现在、说话瞬间或当前一直正在做着的动作。Eg：Jenny is watching TV now.I am writing.,二、现在进行时的基本结构： 主语+be动词+动词的现在分词 （be动词在现在进行时句子谓语结构中作组动词用，无词义。be动词的选择运用由句子的主语人称或数决定。）I am speaking.we/You/they are writing.He/She/It is swimming.,三、现
2、在分词的构成： （1）一般动词在后面直接加-ing，如：readreading playplaying (2) 以不发音字母“e”结尾的单词，去掉“e”后加ing,如：writewriting havehaving (3)以“ie”为重读音节结尾的单词，一般变“ie”为y后加-inglielying, tie-tying,(4) “辅音字母+元音字母+辅音字母”结构结尾的重读闭音节单词，加写后面的辅音字母后加ing；如：runrunning swimswimming sitsitting stopstopping,Exercises: 写出下列词的现在分词： make- open- clean
3、- carry lie- see dance- tell- practice- dig-,making,cleaning,lying,dancing,practicing,opening,carrying,seeing,telling,digging,四、现在进行时的形式转换： 1、将一个现在进行时的肯定句变为一般疑问句时，将句中的is或are提到句首： Eg： John is talking to his father.-Is John talking to his father? 2、将现在进行的肯定句变为否定句时，在be动词后面加上not. Eg：The children are pla
4、ying football on the playground.- The children are not playing the football on the playground.,五、现在进行时的判断：（1）一般句中用到表示“在现在”的时间状语，如：now, right now ,at the moment或Its +几点钟句型，常判断用现在进行时。 Eg：Mr.Wu is waiting for me now.Its six oclock. The children are playing basketball. (2)句中用到“listen, look, keep quiet,
5、dont make noise”等提示语时，表明说话间另一个动作正在进行，这时，句子也要用现在进行时。 Eg：keep quiet! The teachers are talking in the office.Look! The cat is eating .,(3)现在进行时常用来表示在当前一直做着的动作，这时句中常用“these days , all the time”等时间状语。 Eg：These days, uncle Wang is building a room for his dog. (4)通过上下文句义，表明某一动作是现在或说话瞬间发生的动作，这个句子也要用现在进行时态。
6、Eg：-Is your mother at home?-Yes ,she is. She is watching TV.-Where is Tom?-He is planting trees in the garden.,(5)表示状态和感觉的词，一般不能用于进行时态，因为他们不能表示正在进行的动作。 Eg：look！There are some sheep on the hill. The boat looks like a duck. They want to go home now. (6)对于无法持续动作的词瞬间动词，一般用现在进行时表示将来。如： go, come ,leave ,s
7、tart, arrive等 Eg：We are leaving on Friday.Im coming.,The past continuous tense-过去进行时,知识要点：1、过去进行时的定义 2、过去进行时的构成、用法。,一、过去进行时的定义：过去进行时是表示在过去某一个时刻或一段时间正在进行的动作。 Eg：He was sleeping at 8 oclock last night.,二、过去进行时基本结构：,三、过去进行时的用法： 用法一：表示过去某一时间点或某段时间内正在进行的状态或动作。 Eg：I was reading a book at 5 p.m. yesterday.
8、What were they doing just now?My mother was washing clothes at 9 last night.She was watching TV from 8 oclock to 9 oclock last night.,用法二：表示在过去的某个时间，前后两个动作是同时发生的。 Eg：-What were you doing while Lucy was washing her clothes?-I was playing basketball while she was washing her clothes.,用法三、 描述一件事情发生的背景，
9、一个长动作（持续性动作）发生的时候，另一个短动作（瞬间动作）发生。 Eg：My brother fell while he was riding his bike.It was raining when they left the station.,过去进行时常与“when,while”连用，意思是“当之时”。 注：while后面一般跟延续性动词，常用进行时，when后面既可跟延续性动词，也可跟瞬间动词，常用过去式。 瞬间动词有哪些？ （come，arrive，fall, go ,leave, open, close .),Eg : What was lilei doing when the teacher came in? -He was drawing a picture when the teacher came in. He was playing basketball while she was sleeping.,
