Module 9 Live history 重点语法课件 2022-2023学年外研版七年级英语下册

M9 重点语法 不规则动词及其过去式 学习目标 01 掌握不规则动词的过去式。 温故知新 Part-01 规则动词的过去式一般以______________ 结尾。 规则动词过去式的变化规则 一般情况下， 动词词尾加ed。 2. 以不发音的e结尾的动词， 动词词尾加d。 3. 以“辅音字母+y”结尾， 把y改为i, 再加ed。 4. 以“元音字母+一个辅音字母”结尾的中毒闭音节动词， 双写词尾的辅音字母， 再加ed。 ed 1. He _____________in Missouri in 1835. 2. At the age of 12, He _________school and _______work. 3. Then he ________for a newspaper. 4. Later, he _______work on a boat. 5. In the 1860s, he _________the name Mark Twain and_______famous. Mark Twain 马克吐温 was born left began wrote got took became 不规则动词的过去式 write begin become go leave take became began went left took wrote 不以ed 结尾。 探索新知 Part-02 不规则动词的过去式变化 I read book every day. I read book yesterday. I cut hair. I cut hair yesterday. 规则1：部分动词的________式和原_____一样。 过去 形 变化形式 举例 过去式与原形一样 put→put, let→let, cut→cut, beat→beat, read→read, cost→cost, hurt→hurt 不规则动词的过去式变化 She spends two hours on homework every day. She spent two hours on homework last night. I build a house. I built a house last year. 规则2：部分以_____结尾的动词， 把_____改为_____。 d d t 变化形式 举例 以d结尾的词，将d变为t build→built, lend→lent, send→sent, spend→spent 不规则动词的过去式变化 I know the story . I knew what I wanted to do at the age of 12. She draws pictures every day. She drew his face while she was listening music. 规则3：部分以_____, ______结尾的动词， 把_____，_____ 改为_____。 ow aw ow aw ew 变化形式 举例 以ow / aw结尾的词，将ow / aw变为ew blow→blew, draw→drew, know→knew, grow→grew 不规则动词的过去式变化 --Class begins. He began work at the age of 12. --Sit down, please. She sat on the small chair. --He swims well. He swam in the river when he was young. 规则4：将动词原形中的元音字母_____变为_____。 i a 变化形式 举例 将动词原形中的元音字母i变为a begin→began, give→gave, sing→sang, swim→swam, sit→sat, drink→drank, ring→rang 不规则动词的过去式变化 规则5：将动词原形中的元音字母_____变为_____。 i o -He rides a bike to school. -He rode a bike to school yesterday. -He writes a letter to me. -He wrote a letter to me last week. 变化形式 举例 将动词原形中的元音字母i变为o ride→rode, drive→drove, write→wrote, 不规则动词的过去式变化 She is sleeping.