不规则动词在过去时里不加 -ed，而是变成新的样子，所以要记住：go → went · come → came · see → saw。
go, come, see
Yesterday Amina went to school.
Hiroshi came late.
I saw a film last night.
Not "Yesterday Amina goed to school." — say "Yesterday Amina went to school.". 没有 "goed" 这个词，go 的过去式是一个新词 went。
试一试: Wei: Was Farid at the party? Mei: Yes, he ___ at nine. 补全 Mei 说的话。 (came / comed / comes) 答案: came — Wei 用 Was 来问，说明聚会已经结束了。Come 是不规则动词，过去式是 came，一个新词——没有 "comed" 这个词；comes 说的是 Farid 平时做的事，和这次聚会无关。
试一试: Camila: What a big bag! Lani: I ___ to the market this morning. 补全 Lani 说的话。 (went / goed / go) 答案: went — Lani 拿着一个大袋子，说明东西已经买完了：她说的是自己 this morning 做了什么。Go 是不规则动词，过去式是 went——没有 "goed" 这个词；原形说的是 Lani 每天做的事，不是她今天做了什么。
have, do, make
再记三个：have → had · do → did · make → made。
They had lunch at the cafe.
Sofia did her homework.
Camila made a cake.
Not "Camila maked a cake." — say "Camila made a cake.". 没有 "maked" 这个词，make 的过去式是 made。
试一试: Lars: You look happy! Camila: We ___ a big breakfast together this morning. 补全 Camila 说的话。 (had / haved / have) 答案: had — This morning 已经过去了——Camila 现在看起来很开心，就是因为那顿早餐。Have 是不规则动词，过去式是 had；没有 "haved" 这个词，原形说的是他们每天做的事。
eat, drink, take
这三个你会经常用到：eat → ate · drink → drank · take → took。
Hiroshi ate breakfast at home.
Amina drank some water.
Lars took the metro.
Not "Hiroshi eated breakfast." — say "Hiroshi ate breakfast.". 没有 "eated" 这个词，eat 的过去式是 ate。
试一试: Yasmin: Is there any coffee left? Wei: Sorry, I ___ the last cup ten minutes ago. 补全 Wei 说的话。 (drank / drinked / drink) 答案: drank — Ten minutes ago 已经过去了，the last cup 说明一杯也不剩了。Drink 是不规则动词，过去式是 drank；没有 "drinked" 这个词。
对谁都是同一个形式
除了 was / were，过去式对所有人都一样，而且从不加 -s：I went, she went, they went。
I went home.
She went home.
They went home.
Not "She wents home." — say "She went home.". 像 went 这样的过去式从不加 -s，不管说的是谁。
试一试: Matilda: Where is my sandwich? Ethan: Lars ___ it at lunch. 补全 Ethan 说的话。 (ate / ates / eated) 答案: ate — Lars 是 at lunch（午饭时）吃掉的，那时 Matilda 还没来找。Eat 是不规则动词，过去式是 ate——而且像 ate 这样的过去式从不加 -s，就算是 he、she、it 也一样。
get
get → got. 你可以 get a letter（收到信），也可以 get home（到家）。
Amina got a letter yesterday.
We got home late.
Lars got a good seat on the train.
试一试: Amina: That phone looks new. Wei: I ___ it last week. 补全 Wei 说的话。 (got / getted / get) 答案: got — Last week 已经过去了。Get 是不规则动词，过去式是 got；没有 "getted" 这个词，原形说的是 Wei 平时做的事。
buy
buy → bought. 过去式和 buy 长得很不一样，就当成一个新词来记。
Camila bought bread at Mosh Market.
I bought two tickets.
They bought a small table.
试一试: Lani: Your shirt is nice. Liam: Thanks! I ___ it at the store yesterday. 补全 Liam 说的话。 (bought / buyed / buy) 答案: bought — Yesterday 已经过去了。Buy 是不规则动词，过去式是 bought，样子差别很大；没有 "buyed" 这个词。
meet
meet → met. 记住就好：过去式只有一个 e。
I met Lani at the bus stop.
We met Farid last week.
She met her teacher after class.
试一试: Lars: Do you know Camila? Sofia: Yes, I ___ her at Mosh Market last Sunday. 补全 Sofia 说的话。 (met / meeted / meet) 答案: met — Last Sunday 已经过去了。Meet 是不规则动词，过去式是 met，只有一个 e；没有 "meeted" 这个词。