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1、1 初二学过的六大时态一、一般现在时概念：经常、反复发生的动作。时间状语：always, usually, often, sometimes, every week (day, year, month), once a week, on Sundays, etc.基本结构：be动词；He is tall.行为动词.其他人称用动词原形。I/We/You/You/They+V原。 主语是第三人称单数时用动词的“单三形式”， 动词三单形式的变化规则：1.（1）多数直接在动词词尾加-s. play plays like likes ask-asks work-works get-gets call-c
2、alls（2）以字母s, x, ch, sh或o结尾的动词，在词尾直接加-es. watch-watches wish-wishes do-does go-goes fix-fixed,discuss-discusses （3）以“辅音字母加 - y”结尾的动词，要先变y为i再加-es. try-tries study-studies cry-cries fly-flies2. 不规则变化：be- is have-has3. 一般现在时的句子转换：（1）变一般疑问句：当句子中有be动词或情态动词时，则把be动词或情态动词(can,could等)提到主语的前面.（2）变否定句：在be动词或情态动
3、词后面直接加not变成否定句. (be后not莫忘记)例：陈述句：She is my sister.疑问句 Is she your sister? Yes, she is ./ No, she isnt.否定句 She is not my sister.陈述句：I can play soccer.疑问句 Can you play soccer? Yes,Ican./ No, I cant.否定句 I can not /cant play soccer.（3）当句子中没有be动词，也没有情态动词时，变一般疑问句时，在主语前加助动词do (I, we, you,以及复数), does（第三人称单数
4、she,he,it等）变成问句；（4）变否定句时，在主语后谓语动词前加助动词dont, doesnt变成否定句，切记：助动词后的动词则还原成动词原形。例：陈述句：We get up（起床） at 7:00 every morning.疑问句Do you get up at 7:00 every morning?否定句We dont get up at 7:00 every morning. 陈述句：She has a brother.疑问句 Does she have a brother? 否定句 She doesnt have a brother.巩固练习题： 一、按照要求改写句子1 She
5、 enjoys swmiming very much . (变为否定句) 2 I like apples. (用she改写句子) 3 I dont think he _(need) an agent. 4. Nick _ _(not go) to the zoo on Sunday.5. _ they _(like) pears? 6_ your parents _(have) eggs every day?7.Mike_(like)_(cook).8The boyoften_(watch)TV,.he _(not do)homework at night.二 一般过去时：概念：过去某个时间里
6、发生的动作或状态.时间状语：ago, yesterday, the day before yesterday, last week(year, night, month), in 1989, just now, at the age of 5, one day, long long ago, etc.基本结构：be动词；行为动词否定形式：was/were+not;在行为动词前加didnt，同时还原行为动词。(3)couldnt +v一般疑问句：was或were放于句首；用助动词do的过去式did 提问，同时还原行为动词。(3)could I was a student 6years ago.(
7、 否定句和一般疑问句 ) I could play the piano last year.( 否定句和一般疑问句 ) They saw a film last night .( 否定句和一般疑问句 )动词过去式变化规则。 a)一般情况下的词加-ed. work-worked call-called laugh-laughed b)以不发音的字母e结尾的单词直接加-d live-lived change-changed graduate-graduated c)以“辅音字母y”结尾的单词，变y为i加-ed. study-studied carry-carried cry-cried d)以“元
8、音字母y”结尾的单词直接加-ed. play-played stay-stayed巩固练习题：1 How was your weekend on the farm?- Great! We _ with the farmers.A. enjoy ourselves B. went fishing C. will work D. make friends2 He turned off the light and then _. A. leaves B. has left C. will leave D. left3- Liu Mei cant come tonight.- Why? But she
9、 _ me she would come. A. tells B. told C. is told 三、现在进行时：概念：表示现阶段或说话时正在进行的动作。时间状语：now, at this time, these days, look,listen ,Where is your father? He is doing etc.基本结构：am/is/are+doing 否定形式：am/is/are+not+doing.动词现在分词的构成 一般动词直接在词后加-ing do doing read - reading study studying go going 以不发音的字母e 结尾的动词，应
10、先去掉 e 然后加 inglike liking take taking leave leaving live living dance dancing 以“一个元音字母 + 一个辅音字母”结尾的动词，应先双写这个辅音字母然后再加-ingstop stopping begin beginning swim swimming run running sit sitting put-putting plan-planning get-getting 巩固练习题：1 Look! The boy _ with his mother in the pool.A. is swimming B. is sw
11、imming C. are swimming D. are swiming 2.- What is Tom doing in the classroom? - He _ something on the blackboard. A. draws B. draw C. is drawing D. are drawing.3 Some girls _(run) while some boys are playing basketball now.4 He often wears a hat.(now) ._now.5 _ yourf father _(clean)his car?No,he is
12、cooking .四、过去进行时：概念：表示过去某一时刻正在发生或进行的行为。时间状语：at this time yesterday, at that time或以when引导的谓语动词是一般过去时的时间状语等。基本结构：was/were+doing 否定形式：was/were + not + doing.用动词的适当形式填空。1. While we _ (wait) for the bus, a girl ran to us.2. I _ (telephone) a friend when Bob _ (come) in.3. While mother _ (put) Cathy to be
13、d, the door bell _ (ring).4. When I _ (walk) in the park, it _ (begin) to rain.5. It was quite late at night. George _ (read) and Amy _ (ply) her needle when they _ (hear) a knock at the door.6. I _ (have) my breakfast at half past six yesterday morning.7. What _ you _ (do) at that time? We _ (watch) TV.8. Was your father at home yesterday evening? Yes, he was. He _ (listen) to the radio.9 They _(not make) a cake when I saw him.10. _ they _ (have) a meeting at 4 yesterday afternoon?No, they _. They _ (clean
