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1、The past tense;The past continuous tense构成构成用法用法常用时间常用时间动词的过去式动词的过去式1、表示过去某个时、表示过去某个时 间发生的动作或间发生的动作或存在的状态。存在的状态。2、表示过去经常或、表示过去经常或 反复发生的动作。反复发生的动作。yesterdaylast nightin 1990two days ago The past tense规则动词不规则动词构成读音规则动词过去式的构成规则动词过去式的构成构成规则例词1、一般在动词原形末尾加 ed look looked play played start started2、结尾是 e 的
2、动词加-d live lived hope hoped use used3、末尾只有一个辅音字母的 重读闭音节词，先双写这 个辅音字母，再加ed stop stoppedplan plannedtrip tripped4、结尾是“辅音字母+y”的动词，先变“y”为“i”再加ed study studiedcarry carried不规则动词过去式：come-came go-went do-did have/has-haddraw-drew fly-flewdrink-drank begin-began give-gavesing-sang sit-sat run-ran swim-swam t
3、ake-tookget-got write-wrote tell-toldeat-ate am/is-was are-were see-sawsteal-stole feel-felt know-knewspend-spent make-made put-put read-readWhat Demings father at 7:15 last night?He his newspaper.wasdoingwas readingn.报纸报纸 Demings father his newspaper now.Demings father his newspaper last night.is r
4、eadingread The past continuous tense 过去进行时过去进行时What Demings grandmother and her friend between 6:20 and 8:15 last night?They .weredoingwere talking The past continuous tense be+v.+ing(was/were)3.Ving 变化规则：变化规则：1）一般加）一般加 ing.如如:play-playing watch-watching2)以不发音的以不发音的e 结尾结尾,去去e 加加ing.3)如如:take-taking
5、4)come-coming3)元元+辅结尾辅结尾,且是重读闭音节的单词且是重读闭音节的单词,双双写辅音字母写辅音字母+ing.4)如如:run-running 5)swim-swimming一般过去时和过去进行时的比较：一般过去时和过去进行时的比较：1 1）过去进行时表示过去某个时间正在进）过去进行时表示过去某个时间正在进行的动作，往往表示动作的未完成性；行的动作，往往表示动作的未完成性；而一般过去时表示在过去某个时间的动而一般过去时表示在过去某个时间的动作或存在的状态，往往表示动作已完成。作或存在的状态，往往表示动作已完成。如：如：Helen wrote a letter to her fr
6、iend Helen wrote a letter to her friend last night.(last night.(信写完了）信写完了）Helen was writing a letter to her Helen was writing a letter to her friend last night.(friend last night.(信不一定写完）信不一定写完）2 2）过去进行时和一般过去时都可表示某）过去进行时和一般过去时都可表示某段时间内发生的动作或情况，但过去进段时间内发生的动作或情况，但过去进行侧重动作持续时间的长度；而一般过行侧重动作持续时间的长度；而一般过去
7、时只说明过去某时发生某事，侧重说去时只说明过去某时发生某事，侧重说明事实。如：明事实。如：It was raining heavily last night.It was raining heavily last night.(侧重下雨持续时间长）侧重下雨持续时间长）It rained heavily last night.(It rained heavily last night.(侧重侧重说明下雨这一事实）说明下雨这一事实）3 3）当有这些时间状语时，常用过去进行）当有这些时间状语时，常用过去进行时。如：时。如：(at)this time last night,at 9:00(at)thi
8、s time last night,at 9:00 yesterday,when I saw him,while I yesterday,when I saw him,while I was watching TV,from seven to was watching TV,from seven to nine,(at)this time yesterday.nine,(at)this time yesterday.What were you doing this time What were you doing this time yesterday?yesterday?He was dra
9、wing an elephant on the He was drawing an elephant on the blackboard when the teacher came in.blackboard when the teacher came in.过去进行时和一般过去时连用过去进行时和一般过去时连用某事正在进行的过程中，发生某事正在进行的过程中，发生了别的事情时，了别的事情时，往往前者用过往往前者用过去进行时，后者用一般过去时去进行时，后者用一般过去时。前后两个句子可以用前后两个句子可以用whenwhen,whilewhile,as as或或andand等连接。例如：等连接。例如：I I was drivingwas driving along the along the motorway when my car motorway when my car broke broke downdown.我正在高速路上行驶着，我正在高速路上行驶着，突然车坏了。突然车坏了。While she While she was waitingwas waiting,her phone,her phone rangrang.她在等候的时候电话响了。她在等候的时候电话响了。Classisover!Classisover!Goodbye!Goodbye!