1、UNIT 2 Keeping Healthy TOPIC 1 You should brush your teeth twice a day Section C -一般过去时的知识点,一般过去时 动词变过去式,past,now,future,动词过去式 的构成,规则动词 regular verbs,不规则动词 irregular verbs,规则动词 过去式的构成,1、一般在动词末尾加 ed,look Walk paint play clean Visit Want cough watch,look ed Walked painted played cleaned Visited Wanted
2、 coughed watched,2、结尾是 e 的动词只加 - d,live hopeuse,lived hopedused,3.重读闭音节词，先双写这个辅音字母，再加ed,stoppat,stoppedpatted,4. 以“辅音字母+y”结尾的词，先变“y”为“i”再加ed,study WorryEarlyHappy,studyied WorryiedEarlyiedHappyied,不规则动词 过去式的构成,1.过去式与原形一样,letlet（让）,putput (放下）,cut cut（砍，剪）,readread（读）,2.把元音字母变成“a”,come came give gave
3、 become becamedrink drank begin began,剩余不规则动词,剩余不规则动词表,Infinitive Past Tenseam, isare dogohave makeget,Infinitive Past Tenseeatsaysee,wasweredidwenthadmadegot,atesaidsaw,一般过去时 肯定句变否定句,be动词类否定句实义动词类,1 （be动词类）在表示过去存在的状态 的句子中在was, were的后面加上not。,如： 肯定句：He was in the park the day before yesterday. 否定句： H
4、e was not in the park the day before yesterday.肯定句：We were busy last week. 否定句： We were not busy last week.,2（行为动词类）要在行为动词的前面加助动词didnt. 然后把动词过去式改为动词原形。 即：didnt + 动词原形,肯定句：She played the violin last night. 否定句： She didnt play the violin last night.肯定句：They swam in the lake yesterday. 否定句： They didnt
5、swim in the lake yesterday.,一般过去时否定句练习,肯定句: They made a kite a week ago. 否定句：They didnt make a kite a week ago.肯定句： He was ill yesterday. 否定句：He was not ill yesterday.肯定句：The cat ate a bird last night. 否定句：The cat didnt eat a bird last night.,一般过去时的 一般疑问句,1.把was, were放在句首, 其余位置不变。,（1） He was born in
6、 Shanghai. Was he born in Shanghai? (一般疑问句)Yes, he was. (肯定回答) No, he wasnt. (否定回答),一般过去时表示过去某个时间发生的动作或存在的状态，常和表示过去的时间状语连用。 yesterday（昨天） last night（昨天晚上） last week （上周）last Sunday（上周日）in 1990 just now （刚才）long long ago（很久以前）,（2）They were in Li Yans home last night. Were they in Li Yans home last night? （一般疑问句）Yes, they were. (肯定回答) No, they werent. (否定回答),Thank you!,
