Unit 5 What were you doing when the rainstorm came? Step 1
回顾动词过去式 一、动词过去式变化规则:
1、 一般情况下,动词原形词尾加-ed, 如:work-worked play-played want-wanted ask-asked
2、 以不发音的-e结尾动词,动词词尾加-d, 如:live-lived move-moved taste-tasted
3、 以"辅音字母+y"结尾的动词,把y改成i, 加-ed, 如:study-studies try-tried copy-copied carry-carried;以元音字母+y结尾的动词,在动词原形后直接加- ed,play-played
4、 以重读闭音节结尾的且末尾只有一个辅音字母的动词,双写词尾辅音字母,再加-ed, 如:stop-stopped
二、不规则变化
(1) AAA型(动词原形、过去式、过去分词同形)
cost(花费)cut(割) put(放) read(读)
(2) AAB型(动词原形与过去式同形)
beat(跳动) beat beaten
(3) ABA型(动词原形与过去分词同形)
become(变成) became become
come(来) came come
run(跑) ran run
(4) ABB型(过去式与过去分词同形)
get(得到) got hold(抓住) held Step 2
回顾学过的be词 Be
现在式
第一人称 am
单数第三人称和不可数名词作主语时 is
第二人称和第一二三人称以及复数名词作主语时用 are
过去式
Was 和 were
Step 3
回顾现在进行时的结构 现在进行时的结构
Am is are + Ving (现在分词)